50）dialog樣式
51）開啟一個提示音
52）從服務器獲取json數據
53）創建txt文件，并向其寫數據
54）獲取狀態欄高度
55）獲取標題欄高度
56） 截屏代碼
57） listview的點擊變換背景色
58）自定義主題風格
59）最省代碼的按鈕監聽
60） 在service中使用Toast的方法
61）最簡單的等待窗
62） 手機拍照并保持圖片
63）獲取手機相冊中縮略圖和原始圖
64）根據路徑加載sd卡中的圖片的方法
65） 加載一張本地高清大圖的方法
66）點擊兩次返回退出
67） 自定義View 自適應寬高
68）將activity變為dialog代碼
69）自定義Dialog時，可以給dialog設置自己的風格 R.style.my_tips_dialog
70）sd卡創建文件夾和保存文件
71）自畫圓角矩形
72） 根據adapter中的數據來設置listview的高度
73） EditText 是否彈出軟鍵盤的問題
74）UI界面使用EditText時，在注冊文件中對該activity添加軟鍵盤屬性：
75） 善用Android預定義樣式
76）view的抖動效果
77）activity的切換動畫
78）listView的setOnItemClickListener方法中可以控制adapter中的組件
79）接口回調標準代碼
80）Listview 點擊item項后，讓item常亮
81）點擊組件背景白變灰色
82）自畫button，有點擊效果
83）View懸浮在所有View之上：

84. 獲取res里圖片資源的id的方法
    85）將dp轉換為px
    86）一個TextView展示多行數據
    87）隱藏軟鍵盤
    88）ToggleButton開關按鈕的使用
    89） ObjectAnimator 創建動畫
    90）開機自啟動
    91）EditText inputType說明
    92）dip，px轉換
    93）適配
    94） 動態添加布局
    95） 獲取網絡連接模式
    96）反射方法獲取狀態欄高度
    97）每隔一秒鐘向主線程發送數據
    98）剪切（Clip）圖像資源
    99）常用的一些系統屬性
    100）如果sd卡存在就創建目錄，如果沒有就將目錄創建在緩存

51）開啟一個提示音
    private void initMusic() {

        Uri notification = RingtoneManager
                .getDefaultUri(RingtoneManager.TYPE_ALARM);
        r = RingtoneManager.getRingtone(getApplicationContext(), notification);
        if (r.isPlaying()) {
            r.stop();
        } else {
            r.play();
        }
    }

 52）從服務器獲取Json數據
        HttpPost request = new HttpPost("http://rest.careyou360.com/FamilyRest/getFamilyState");
        JSONObject param = new JSONObject();
        try {
            param.put("restVersion", 1);
            param.put("platform", "android");
            param.put("familyId", "10000");
            param.put("userId", "10000");
            StringEntity se = new StringEntity(param.toString());  //綁定到請求 Entry
            request.setEntity(se);   
            // 發送請求  
            HttpResponse httpResponse = new DefaultHttpClient().execute(request);  
            //服務器返回的數據
            String retSrc = EntityUtils.toString(httpResponse.getEntity());
        }

53）創建txt文件，并向其寫數據
    private void saveData() {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            File sdCardDir = Environment.getExternalStorageDirectory();
            
            File saveFile = new File(sdCardDir, "微心百源Ble名單.txt");
            FileOutputStream outStream;
            if(backbleList.size()>0&&backbleList!=null){
                try {
                    outStream = new FileOutputStream(saveFile,true);
                    for (int i = 0; i < backbleList.size(); i++) {
                        outStream.write(backbleList.get(i).getName().getBytes()); 
                        outStream.write(" : ".getBytes());
                        outStream.write(backbleList.get(i).getAddress().getBytes());
                        outStream.write("\n".getBytes());
                    }
                    outStream.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } 
            }
        }else{
            Toast.makeText(this, "請插入sd卡", Toast.LENGTH_LONG).show();
        }
        
    }

  54）獲取狀態欄高度
  decorView是window中的最頂層view，可以從window中獲取到decorView，然后decorView有個getWindowVisibleDisplayFrame方法可以獲取到程序顯示的區域，包括標題欄，但不包括狀態欄。  
      Rect frame = new Rect();  
      getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  
      int statusBarHeight = frame.top; 

  55）獲取標題欄高度
     int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();  
    //statusBarHeight是上面所求的狀態欄的高度  
    int titleBarHeight = contentTop - statusBarHeight  


  56） 截屏代碼
  
   private byte[] GetandSaveCurrentImage(){
        
        View view = this.getWindow().getDecorView();  
        view.setDrawingCacheEnabled(true);  
        view.buildDrawingCache();  
        Bitmap b1 = view.getDrawingCache();  
     // 獲取狀態欄高度  
        Rect frame = new Rect();  
        this.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  
        int statusBarHeight = frame.top;  
        Log.i("TAG", "" + statusBarHeight);  
        
        int width = this.getWindowManager().getDefaultDisplay().getWidth();  
        int height = this.getWindowManager().getDefaultDisplay()  
                .getHeight();  
        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height  
                - statusBarHeight); 
        view.destroyDrawingCache(); 
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        b.compress(Bitmap.CompressFormat.PNG, 100, baos);
        
        return baos.toByteArray();
        
    }

  public Bitmap ScreenShot(Activity context){
        // 獲取windows中最頂層的view
        View view=context.getWindow().getDecorView();
        view.buildDrawingCache();
        
        // 獲取狀態欄高度
        Rect rect=new Rect();
        view.getWindowVisibleDisplayFrame(rect);
        int statusBarHeights = rect.top;
        Display display = context.getWindowManager().getDefaultDisplay();
        
        // 獲取屏幕寬和高
        int widths = display.getWidth();
        int heights = display.getHeight();
        
        // 允許當前窗口保存緩存信息
        view.setDrawingCacheEnabled(true);
        
        // 去掉狀態欄
        Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0,
                statusBarHeights, widths, heights - statusBarHeights);
        
        // 銷毀緩存信息
        view.destroyDrawingCache();
        return bmp;
    }
  




  57） listview的點擊變換背景色

    android:listSelector="@drawable/record_item_selector"
  
    <selector
            xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true" android:drawable="@color/gray" />
        <item android:drawable="@color/transparent" />
    </selector>


  58）自定義主題風格
     android:theme="@style/MyAppTheme" 

     theme.xml文件
      <resources xmlns:android="http://schemas.android.com/apk/res/android">
        <style name="MyAppTheme" parent="android:Theme">
            <item name="android:windowNoTitle">true</item>   //沒有標題欄
             <item name="android:textSize">16sp</item>  //默認全局的字體大小
             <item name="android:textColor">@color/main_color</item>  //默認全局的字體顏色
             <item name="android:buttonStyle">@style/btnDefault</item>  //自定義按鈕
             <item name="android:windowBackground">@color/main_background</item>  //默認activty的背景顏色
        </style>

        <style name="btnDefault">
            <item name="android:background">@drawable/btn_default_small_normal</item>
            <item name="android:layout_width">fill_parent</item>
            <item name="android:layout_height">40dp</item>
        </style>

    </resources>
      
59）最省代碼的按鈕監聽  

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/begin_record"
        android:layout_margin="10dp"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
        android:onClick="doClick"
        android:text="@string/begin_record" />

    <Button
        android:id="@+id/stop_record"
        android:layout_margin="10dp"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
        android:onClick="doClick"
        android:text="@string/stop_record" />
    

</LinearLayout>

   public void doClick(View view) {     
        switch (view.getId()) {
        case R.id.begin_record:
            Toast.makeText(getApplicationContext(), "開始錄音", 1).show();
            break;
        case R.id.stop_record:
            Toast.makeText(getApplicationContext(), "停止錄音", 1).show();
            break;
        
        }
    }


60） 在service中使用Toast的方法
   private void showMessage(final String msg){      
        mHandler.post(new Runnable() {
            
            @Override
            public void run() {
                Toast.makeText(BleConnectService.this, msg, 1).show();          
            }
        });
    }

61）最簡單的等待窗
 
 mProgressDialog =ProgressDialog.show(getApplicationContext(), null, "正在加載.....");


62）手機拍照并保存圖片

    intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp1.jpg")));
    this.startActivityForResult(intent, 1);


63）獲取手機相冊中縮略圖和原始圖

 獲取縮略圖：

 public void getThumbnail(){
     cr = this.getContentResolver();
     String[] projection = { Thumbnails._ID, Thumbnails.IMAGE_ID,
                Thumbnails.DATA };
     Cursor cursor = cr.query(Thumbnails.EXTERNAL_CONTENT_URI, projection,
                null, null, null);

     if(cur.moveToFirst()){
            int _id;
            int image_id;
            String image_path;
            int _idColumn = cursor.getColumnIndex(Thumbnails._ID);
            int image_idColumn = cursor.getColumnIndex(Thumbnails.IMAGE_ID);
            int dataColumn = cursor.getColumnIndex(Thumbnails.DATA);
            
            do{
                _id = cursor.getInt(_idColumn);
                image_id = cursor.getInt(image_idColumn);
                image_path = cursor.getString(dataColumn);
//              Log.i("TAG", image_path);
                Thumbnail nail=new Thumbnail();
                Log.i("TAG", image_id+"");
                nail.setImage_id(image_id+"");
                nail.setImage_path(image_path);
                list.add(nail);
            }while (cur.moveToNext());      
        }
 }


  根據縮略圖id獲取原始圖:

     protected String getOriginalImagePath(String image_id) {
        String path = null;
        String[] projection = { Media._ID, Media.DATA };
        
        Cursor cursor = cr.query(Media.EXTERNAL_CONTENT_URI, projection,
                Media._ID + "=" + image_id, null, null);
        if (cursor != null) {
            cursor.moveToFirst();
            path = cursor.getString(cursor.getColumnIndex(Media.DATA));
        }
        return path;
    }


64）根據路徑加載sd卡中的圖片的方法
    Bitmap bm = BitmapFactory.decodeFile(filepath);
    //將圖片顯示到ImageView中
    img.setImageBitmap(bm);


65） 加載一張本地高清大圖的方法：
// url是本地大圖的sd卡位置
private Bitmap getoptBitmap(String url) {
        BitmapFactory.Options opts = new Options();
        opts.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(url,opts);
        // 從Options中獲取圖片的分辨率
        int imageHeight = opts.outHeight;
        int imageWidth = opts.outWidth;
        
        // 獲取Android屏幕的服務
        WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
        int windowHeight = wm.getDefaultDisplay().getHeight();
        int windowWidth = wm.getDefaultDisplay().getWidth();
        
     // 計算采樣率
        int scaleX = imageWidth / windowWidth;
        int scaleY = imageHeight / windowHeight;
        int scale = 1;
        if (scaleX > scaleY && scaleY >= 1) {
            scale = scaleX;
        }
        if (scaleX < scaleY && scaleX >= 1) {
            scale = scaleY;
        }
        
        opts.inJustDecodeBounds = false;
        opts.inSampleSize = scale;
        return BitmapFactory.decodeFile(url,opts);
    }
  

  66）點擊兩次返回退出

  public boolean onKeyDown(int keyCode, android.view.KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK){
             exitBy2Click();
        }
        return false;
    }
    private static Boolean isExit = false;  
    private void exitBy2Click() {
        Timer tExit = null;  
        if (isExit == false) {  
            isExit = true;  
            MCToast.show("再按一次退出程序", this);     
            tExit = new Timer();  
            tExit.schedule(new TimerTask() {  
                @Override  
                public void run() {  
                    isExit = false; 
                }  
            }, 2000); 
      
        } else {  
            finish();   
        }  
    };

67） 自定義View 自適應寬高
   @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int measuredHeight = measureHeight(heightMeasureSpec);
        int measuredWidth = measureWidth(widthMeasureSpec);
        setMeasuredDimension(measuredWidth, measuredHeight);
    }

    private int measureWidth(int measureSpec) {
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        int result = XScale*data.size();
        if (specMode == MeasureSpec.AT_MOST){
            result = specSize;
        }else if(specMode == MeasureSpec.EXACTLY){
            result = specSize;
        }
        return result;
    }

    private int measureHeight(int measureSpec) {
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        int result = 500;
        if (specMode == MeasureSpec.AT_MOST){
            result = specSize;
        }else if(specMode == MeasureSpec.EXACTLY){
            result = specSize;
        }
        return result;
    }


68）將activity變為dialog代碼
    在注冊文件中寫android:theme="@style/loading_dialog"

<style name="loading_dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:windowBackground">@color/transparent</item>
    </style>


 69）自定義Dialog時，可以給dialog設置自己的風格 R.style.my_tips_dialog

    MyTipsDialog dialog = new MyTipsDialog(RecordActivity.this, R.style.my_tips_dialog);

    <style name="my_tips_dialog" parent="@android:Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@color/transparent</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>


70）sd卡創建文件夾和保存文件
//創建文件夾
public class DataPathUtil {
    
    public static String getDataBasePath() {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            String parentPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/cwatch_cardio/";
            File tempFile = new File(parentPath);
            if (!tempFile.exists()) {
                tempFile.mkdirs();
            }
            return parentPath;
        }
        return null;
    }
}

recordFileName = DataPathUtil.getDataBasePath() + "BtData_"+ new Date().getTime() + ".dat";
File ecgFile = new File(recordFileName);
if(ecgFile!= null && ecgFile.exists()){
        ecgFile.delete();
}   


//創建文件
carmaCarfile = new File(DataPathUtil.getDataBasePath(), String.valueOf(System.currentTimeMillis())+ ".jpg");
    
  
 71）自畫圓角矩形

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- 點擊效果 -->
    <item android:state_pressed="true">
        <shape>
            <!-- 填充 -->
            <solid android:color="@color/gray" />
            <!-- 描邊  描邊的寬度和描邊的顏色值 -->
            <stroke android:width="1dp" android:color="@color/gray" />
            <!-- 圓角 -->
            <corners android:topLeftRadius="8dp" android:topRightRadius="8dp" />
            <!-- 設置各個方向的間隔 -->
            <padding android:bottom="0dp" android:left="10dp" android:right="10dp" android:top="0dp" />
        </shape>
    </item>
    
    <!-- 默認 -->
    <item>
        <shape>
            <solid android:color="@android:color/white" />
            <corners android:topLeftRadius="8dp" android:topRightRadius="8dp" />
        </shape>
    </item>
    
</selector>


72） 根據adapter中的數據來設置listview的高度

private void setListViewHeightBasedOnChildren(ExtendedListView listView) {
        ListAdapter listAdapter = listView.getAdapter();  //得到該listview的適配器數據多少
        if(listAdapter == null){
            return;
        }
        int totalHeight=0;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);     
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

73） EditText 是否彈出軟鍵盤的問題

    1.想要一進入activity后，就彈出軟鍵盤的方法是在注冊文件activity下添加：
       android:windowSoftInputMode="stateVisible|adjustPan"

    2. 進入activity后，不彈出軟鍵盤的方法是：
        一 在注冊文件中添加：android:windowSoftInputMode="adjustUnspecified|stateHidden" 

        二 讓Edittext失去焦點： EditText edit=(EditText)findViewById(R.id.edit); 
                                edit.clearFocus(); 
    
        三 強制隱藏Android輸入法窗口
           EditText edit=(EditText)findViewById(R.id.edit); 
           InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
           imm.hideSoftInputFromWindow(edit.getWindowToken(),0);

      3. 始終不彈出軟件的方法：
            EditText edit=(EditText)findViewById(R.id.edit); 
            edit.setInputType(InputType.TYPE_NULL); 

74）UI界面使用EditText時，在注冊文件中對該activity添加軟鍵盤屬性：
        android:windowSoftInputMode="adjustResize|stateHidden"
        adjustResize： 不修改界面  stateHidden：不自動彈出


75） 善用Android預定義樣式

字體大小：
"?android:attr/textAppearanceLarge"，"?android:attr/textAppearanceMedium" ，"?android:attr/textAppearanceSmall"
 
 android:textAppearance="?android:attr/textAppearanceLarge" 或者
 style="?android:attr/textAppearanceLarge" 

字體顏色：
android:textColor="?android:attr/textColorPrimary" 
android:textColor="?android:attr/textColorSecondary" 
android:textColor="?android:attr/textColorTertiary" 
android:textColor="?android:attr/textColorPrimaryInverse" 
android:textColor="?android:attr/textColorSecondaryInverse"

分隔符：
 橫向：
<View android:layout_width="fill_parent" 
      android:layout_height="1dip" 
      android:background="?android:attr/listDivider" />

 縱向：
<View android:layout_width="1dip" 
      android:layout_height="fill_parent" 
      android:background="?android:attr/listDivider" />
   
 CheckBox
    style="?android:attr/starStyle"
 類似標題欄效果的TextView
    style="?android:attr/listSeparatorTextViewStyle"
 其它有用的樣式
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:paddingRight="?android:attr/scrollbarSize"
    style="?android:attr/windowTitleBackgroundStyle"
    style="?android:attr/windowTitleStyle"
    android:layout_height="?android:attr/windowTitleSize"
    android:background="?android:attr/windowBackground"

76）view的抖動效果（左右抖動）
            TranslateAnimation anim = new TranslateAnimation(imageView.getWidth(),  
            imageView.getWidth() + 10, imageView.getHeight(), imageView.getHeight());  
            anim.setInterpolator(new CycleInterpolator(6f));  //循環次數  
                                   //CycleInterpolator：動畫從開始到結束，變化率是循環給定次數的正弦曲線。  
            anim.setDuration( 500 );             //播放時間 

            magview.startAnimation(anim);



77）activity的切換動畫② 
  ① 從右到左 →
  overridePendingTransition(R.anim.in_form_left, R.anim.out_of_right);

  in_form_left：
     <?xml version="1.0" encoding="utf-8"?>  
    <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="-100%p"   
            android:toXDelta="0%p"  
            android:duration="500" />  
    </set>  
   out_of_right：
     <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="0%p"   
            android:toXDelta="100%p"  
            android:duration="500" />  
    </set>  ④

  ① 從左到右 ←
  getActivity().overridePendingTransition(R.anim.in_from_right, R.anim.out_of_left);

  in_from_right：
     <?xml version="1.0" encoding="utf-8"?>  
     <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="100%p"   
            android:toXDelta="0%p"  
            android:duration="500" />  
    </set>  
  out_of_left：
    <?xml version="1.0" encoding="utf-8"?>  
    <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="0%p"   
            android:toXDelta="-100%p"  
            android:duration="500" />  
    </set>  

    
  ③ 上下切換：
     out_to_up.xml (從屏幕上面退出)
        <?xml version="1.0" encoding="utf-8"?>
        <translate xmlns:android="http://schemas.android.com/apk/res/android"
            android:interpolator="@android:anim/accelerate_interpolator"
            android:fromYDelta="0%p"
            android:toYDelta="-100%p"
            android:duration="1000">
        </translate>
    in_from_down.xml (從屏幕下面進入)
        <?xml version="1.0" encoding="utf-8"?>
        <translate xmlns:android="http://schemas.android.com/apk/res/android"
            android:interpolator="@android:anim/accelerate_interpolator"
            android:fromYDelta="100%p"
            android:toYDelta="0%p"
            android:duration="1000">
        </translate>
  ④

78）listView的setOnItemClickListener方法中可以控制adapter中的組件
     listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                View lastCheckedOption = view.findViewById(R.id.doctor_adapter_re);
                lastCheckedOption.setBackgroundColor(color.gray_alarm);
            }
        });


79）接口回調標準代碼
 
    ① 通過方法的方式
    public interface OnListViewItemClik{
        void setItemClick(int position);
    }
    
    public void setListViewItemClik(OnListViewItemClik onclick){
        this.onclick=onclick;
    }

    ② 通過參數分方式
    private interface OnListViewItemClik{
        void setItemClick(int position);
    }

    public BleAdapter(List<BleDevice> bleList,OnBleConnectChangeListener listener ) {
        this.context=context;
        this.listener=listener;
    }   


80）Listview 點擊item項后，讓item常亮
  
   listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                if(((ListView)parent).getTag() != null){
                    ((View)((ListView)parent).getTag()).setBackgroundColor(Color.TRANSPARENT);
                }
                ((ListView)parent).setTag(view);
                view.setBackgroundColor(color.gray_alarm);
            }
        });


81）點擊組件背景白變灰色
  <selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@color/gray_white"></item>
    <item android:state_pressed="false" android:drawable="@color/white"></item>
</selector>

82）自畫button，有點擊效果

    <?xml version="1.0" encoding="utf-8"?>
    <selector
      xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#18c2ed"/>
                <stroke android:width="1dp" android:color="#18c2ed"/>
                <corners android:radius="10dp" />
                <padding android:bottom="10dp" android:left="30dp" android:right="30dp" android:top="10dp"/>       
            </shape>
        </item>     
        <item android:state_pressed="false">
            <shape android:shape="rectangle">
                <stroke android:width="1dp" android:color="#FFFFFF"/>
                <corners android:radius="10dp" />
                <padding android:bottom="10dp" android:left="30dp" android:right="30dp" android:top="10dp"/>       
            </shape>    
        </item>     
    </selector>

83）View懸浮在所有View之上：
  
        WindowManager wm = (WindowManager) getApplicationContext()
                .getSystemService(WINDOW_SERVICE);
        WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
        wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY; 
        wmParams.format = 1;
        wmParams.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL | LayoutParams.FLAG_NOT_FOCUSABLE;;
        wmParams.width = 200;
        wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;;
        wm.addView(new Button(getApplicationContext()), wmParams); // 創建View


        <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>  


84) 獲取res里圖片資源的id的方法：
         level++；
         int resId=context.getResources().getIdentifier("v"+level, "drawable", context.getPackageName());
         mVoice.setImageResource(resId);


85）將dp轉換為px
  mMenuRightPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50,
                              context.getResources().getDisplayMetrics());
  
86）一個TextView展示多行數據
    String str=new StringBuilder()
        .append("\n")
        .append("說明：").append("\n")
        .append("1.懸浮窗可隨意移動").append("\n")
        .append("2.實時顯示當前內存數據").append("\n")     
        .append("3.上層數據表示可用內存值").append("\n")
        .append("4.下層數據表示總內存值").append("\n")
        .append("5.點擊懸浮窗出現關閉小圖標可直接關閉").append("\n").append("\n").toString();
        tv.setText(str);     
        
87）隱藏軟鍵盤
  private void hideKeyboard() {
        if(imm==null){
            imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
        }
        if(imm.isActive()){
            imm.hideSoftInputFromWindow(heightEditText.getWindowToken() , 0); 
        }
    }
   
   有EditText的activity都要加這句話
   android:windowSoftInputMode="adjustUnspecified|stateHidden"

88）ToggleButton開關按鈕的使用

        <style name="setting_toggle_button" parent="android:style/Theme">
                 <item name="android:layout_width">60dp</item>
                <item name="android:layout_height">32dp</item>
                <item name="android:layout_centerVertical">true</item>
                <item name="android:layout_alignParentRight">true</item>
                <item name="android:textOn">""</item>
                <item name="android:textOff">""</item>
                <item name="android:background">@drawable/setting_toggle_bg_sel</item>
                <item name="android:clickable">false</item>
         </style>

        setting_toggle_bg_sel.xml:
         <?xml version="1.0" encoding="utf-8"?>
        <selector xmlns:android="http://schemas.android.com/apk/res/android">
            <item android:drawable="@drawable/setting_item_unselected" android:state_checked="false"/>
            <item android:drawable="@drawable/setting_item_selected" android:state_checked="true"/>
        </selector>

        fitlerBWToggle.setChecked(value);

89） ObjectAnimator 創建動畫

        /*
     * 執行一個動畫
     */
    public void animClick(View v){  
        ObjectAnimator objAnimator=ObjectAnimator.ofFloat(imageView, "translationX", 0,100);
        objAnimator.setDuration(2000);
        objAnimator.setRepeatCount(10);
        objAnimator.setInterpolator(new LinearInterpolator());
        objAnimator.start();
    }
    
    /**
     * 兩個動畫同時執行
     */
    public void animClick(View v){  
        ObjectAnimator anim1 = ObjectAnimator.ofFloat(imageView, "scaleX",  
                1.0f, 2f);  
        ObjectAnimator anim2=ObjectAnimator.ofFloat(imageView, "alpha", 1f,0f);
        AnimatorSet animSet = new AnimatorSet();  
        animSet.setDuration(2000);  
        animSet.setInterpolator(new LinearInterpolator());  
        //兩個動畫同時執行  
        animSet.playTogether(anim1, anim2);  
        animSet.start();  
    }
    
    /** 
     * anim1，anim2,anim3同時執行 
     * anim4接著執行 
     */  
    public void animClick(View v){  
        float cx = imageView.getX();  
          
        ObjectAnimator anim1 = ObjectAnimator.ofFloat(imageView, "scaleX",1.0f, 2f);  
        ObjectAnimator anim2 = ObjectAnimator.ofFloat(imageView, "scaleY",1.0f, 2f);  
        ObjectAnimator anim3 = ObjectAnimator.ofFloat(imageView, "x",  cx ,  0f);  
        ObjectAnimator anim4 = ObjectAnimator.ofFloat(imageView,"translationX", 0,360f);  
        AnimatorSet animSet = new AnimatorSet();  
        animSet.play(anim1).with(anim2);  
        animSet.play(anim2).with(anim3);  
        animSet.play(anim4).after(anim3);  
        animSet.setDuration(1000);  
        animSet.start();  
    }


90）開機自啟動

  開機后系統會發送一個啟動完畢的廣播，Intent.ACTION_BOOT_COMPLETED，
  那么我們只需要自定義一個BroadcastReciever接收這個廣播，在接收到廣播后啟動我們的程序就可以實現開機啟動了。

  public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
            // 是否選擇了開機啟動
            boolean start = PreferenceManager.getDefaultSharedPreferences(
                    context).getBoolean(
                    CleanerActivity.KEY_START_WHEN_BOOT_COMPLETED, true);
            if (start) {
                Intent i = new Intent();
                i.setClass(context, FloatService.class);
                context.startService(i);
            }
        }
    }
}

    AndroidManifest.xml中的聲明如下：
     <receiver android:name="MyBroadcastReceiver" >
                <intent-filter>
                    <action　　android:name="android.intent.action.BOOT_COMPLETED" />
                </intent-filter>
    </receiver>


91）EditText inputType說明

    android:inputType="textCapWords"http://單詞首字母大小
    android:inputType="textCapSentences"http://僅第一個字母大小
    android:inputType="textAutoCorrect"android:inputType="textAutoComplete"http://前兩個自動完成
    android:inputType="textMultiLine"http://多行輸入
    android:inputType="textImeMultiLine"http://輸入法多行（不一定支持）
    android:inputType="textNoSuggestions"http://不提示
    android:inputType="textUri"http://URI格式
    android:inputType="textEmailAddress"http://電子郵件地址格式
    android:inputType="textEmailSubject"http://郵件主題格式
    android:inputType="textShortMessage"http://短消息格式
    android:inputType="textLongMessage"android:inputType="textPersonName"http://人名格式
    android:inputType="textPostalAddress"http://郵政格式
    android:inputType="textPassword"http://密碼格式
    android:inputType="textVisiblePassword"http://密碼可見格式
    android:inputType="textWebEditText"http://作為網頁表單的文本格式
    android:inputType="textFilter"http://文本篩選格式
    android:inputType="textPhonetic"http://拼音輸入格式
    android:inputType="number"http://數字格式
    android:inputType="numberSigned"http://有符號數字格式
    android:inputType="numberDecimal"http://可以帶小數點的浮點格式
    android:inputType="phone"http://撥號鍵盤
    android:inputType="datetime"android:inputType="date"http://日期鍵盤
    android:inputType="time"http://時間鍵盤

92）dip，px轉換
     public static int dip2px(Context context, float dipValue){ 
        final float scale = context.getResources().getDisplayMetrics().density; 
        return (int)(dipValue * scale + 0.5f); 
    } 
    public static int px2dip(Context context, float pxValue){ 
        final float scale = context.getResource().getDisplayMetrics().density; 
        return (int)(pxValue / scale + 0.5f); 
    } 
 
93）適配
       public static int getPhoneDpi(Context context){
            
            WindowManager wm = (WindowManager) context
                    .getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int densityDPI = dm.densityDpi;
            return densityDPI; 
            
        }
        int dip = DensityUtil.getPhoneDpi(context);
        if (dip >= 480) {  //dip是每英寸像素點（分為120低，160中，240高，320超高，480蘋果分辨率）
            canvas.drawText(infoRect.top + 100, textPaint);
            
        } else {
            canvas.drawText(infoRect.top + 60, textPaint);
            
        }

94） 動態添加布局

     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" >
        </FrameLayout>

    </LinearLayout>

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        FrameLayout fl=(FrameLayout)findViewById(R.id.frameLayout);  
        fl.addView(new MyView(this)); 
    
    }


95） 獲取網絡連接模式

        public class NetUtil {
        public static final int NETWORN_NONE = 0;
        public static final int NETWORN_WIFI = 1;
        public static final int NETWORN_MOBILE = 2;

        public static int getNetworkState(Context context) {
            ConnectivityManager connManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            // Wifi
            State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
                    .getState();
            if (state == State.CONNECTED || state == State.CONNECTING) {
                return NETWORN_WIFI;
            }

            // 3G
            state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
                    .getState();
            if (state == State.CONNECTED || state == State.CONNECTING) {
                return NETWORN_MOBILE;
            }
            return NETWORN_NONE;
        }
    }

96）反射方法獲取狀態欄高度
      public static int getStatusBarHeight(Context context) {
        int statusBarHeight = 20;
        try {
            Class<?> _class = Class.forName("com.android.internal.R$dimen");
            Object object = _class.newInstance();
            Field field = _class.getField("status_bar_height");
            int restult = Integer.parseInt(field.get(object).toString());
            statusBarHeight = context.getResources().getDimensionPixelSize(
                    restult);
        } catch (Exception e) {
            e.printStackTrace();
        }
        // Toast.makeText(getActivity(), "StatusBarHeight = " + statusBarHeight,
        // Toast.LENGTH_SHORT).show();
        return statusBarHeight;
    }

97）每隔一秒鐘向主線程發送數據
     mTimer = new Timer();
     mTimer.schedule(new TimerTask() {  
            @Override  
            public void run() {  
                Message message = new Message();  
                message.what = 1;  
                handler.sendMessage(message);  
            }  
        }, 1000, 1000);  /* 表示1000毫秒之後，每隔1000毫秒執行一次 */
  
    private Handler handler = new Handler() {  
        private int progress=0;

        @Override  
        public void handleMessage(Message msg) {  
            super.handleMessage(msg);  
            int msgId = msg.what;  
            switch (msgId) {  
                case 1:  
                    progress++;
                    if(progress==10){
                        mTimer.cancel();
                    }
                    break;   
            }  
        }  
    };  


98）剪切（Clip）圖像資源
  剪切圖像資源可以只顯示一部分圖像，這種資源經常被用在進度條的制作上。剪切圖像資源是一個XML格式文件，資源只包含一個<clip>標簽
    res/drawable/clip.xml
    <?xml version="1.0" encoding="utf-8"?> 
    <clip xmlns:android="http://schemas.android.com/apk/res/android" 
        android:drawable="@drawable/progress" android:clipOrientation="horizontal" 
        android:gravity="left" />

    <ImageView 
        android:id="@+id/image" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:background="@drawable/clip"/> 

    ImageView imageview = (ImageView) findViewById(R.id.image);  
    ClipDrawable drawable = (ClipDrawable) imageview.getBackground();  
    drawable.setLevel(3000)   level的范圍為[0,10000]
  


99）常用的一些系統屬性
    字體大小：
        style="?android:attr/textAppearanceLarge"
        style="?android:attr/textAppearanceMedium"
        style="?android:attr/textAppearanceSmall"
    字體顏色：
        android:textColor="?android:attr/textColorPrimary"
        android:textColor="?android:attr/textColorSecondary"
        android:textColor="?android:attr/textColorTertiary"
        android:textColor="?android:attr/textColorPrimaryInverse"
        android:textColor="?android:attr/textColorSecondaryInverse"
    分隔符 橫向：
        <View
            android:layout_width="fill_parent"
            android:layout_height="1dip"
            android:background="?android:attr/listDivider" />
   
100）如果sd卡存在就創建目錄，如果沒有就將目錄創建在緩存 

     public static String getCurrentDataPath(Context context, String folderName) throws IOException {
            String currentDataPath = "";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                currentDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + folderName;
                File dir = new File(currentDataPath);
                if (!dir.exists())
                    dir.mkdir();
            } else {
                currentDataPath = context.getFilesDir().getAbsolutePath();
            }
            return currentDataPath;
        }