mViewPager.setPageTransformer(true, new ZoomOutPageTransformer());
ViewPager切換動畫之ZoomOutPageTransformer
====
/**
* @author xuchen
* on 2017/1/4.
*/
@SuppressLint("NewApi")
public class ZoomOutPageTransformer implements PageTransformer {
private static float MIN_SCALE = 0.70f;
private static float MIN_ALPHA = 0.2f;
@Override
public void transformPage(View view, float position) {
int pageWidth = view.getWidth();
int pageHeight = view.getHeight();
if (position < -1) {
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
// Modify the default slide transition to
// shrink the page as well
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float vertMargin = pageHeight * (1 - scaleFactor) / 2;
float horzMargin = pageWidth * (1 - scaleFactor) / 2;
if (position < 0) {
view.setTranslationX(horzMargin - vertMargin / 2);
} else {
view.setTranslationX(-horzMargin + vertMargin / 2);
}
// Scale the page down (between MIN_SCALE and 1)
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
// Fade the page relative to its size.
view.setAlpha(MIN_ALPHA + (scaleFactor - MIN_SCALE)
/ (1 - MIN_SCALE) * (1 - MIN_ALPHA));
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
ViewPager切換動畫之DepthPageTransformer
/**
* @author xuchen
* on 2017/1/4.
*/
public class DepthPageTransformer implements PageTransformer {
private static float MIN_SCALE = 0.75f;
@SuppressLint("NewApi")
@Override
public void transformPage(View view, float position) {
int pageWidth = view.getWidth();
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 0) { // [-1,0]
// Use the default slide transition when
// moving to the left page
view.setAlpha(1);
view.setTranslationX(0);
view.setScaleX(1);
view.setScaleY(1);
} else if (position <= 1) { // (0,1]
// Fade the page out.
view.setAlpha(1 - position);
// Counteract the default slide transition
view.setTranslationX(pageWidth * -position);
// Scale the page down (between MIN_SCALE and 1)
float scaleFactor = MIN_SCALE + (1 - MIN_SCALE)
* (1 - Math.abs(position));
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
時間
private void initTime() {
textView = (TextView) findViewById(R.id.tv);
textView.setTextSize(30);
textView.setTextColor(Color.parseColor("#ffffff"));
// textView.setGravity(Gravity.BOTTOM);
handler = new Handler() {
public void handleMessage(Message msg) {
textView.setText((String)msg.obj);
}
};
new Thread(){
@Override
public void run() {
try {
while(true){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str=sdf.format(new Date());
handler.sendMessage(handler.obtainMessage(100,str));
Thread.sleep(1000);
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}.start();
}
動態生成小圓點
//dot_normal.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<corners android:radius="5dp" />
<size android:width="10dp" android:height="10dp" ></size>
<solid android:color="#6D788F" />
</shape>
//dot_selector.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/dot_normal" android:state_selected="false"/>
<item android:drawable="@drawable/dot_focused" android:state_selected="true"/>
</selector>
private ImageView[] dotViews;//存放小圓點
//初始化小圓點
private void initDots() {
numLayout = (LinearLayout) appLayout.findViewById(R.id.ll_pager_num);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(10,0,10,0);
dotViews = new ImageView[pageCount];
for (int i = 0; i < pageCount; i++){
ImageView imageView = new ImageView(getActivity());
imageView.setLayoutParams(layoutParams);
imageView.setImageResource(R.drawable.dot_selector);
if (i==0){
imageView.setSelected(true);
}else {
imageView.setSelected(false);
}
dotViews[i] = imageView;//得到每個小圓點的引用，用于滑動頁面
numLayout.addView(imageView);//添加到布局里面顯示
}
}
//動態切換小圓點
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
for(int i = 0; i < dotViews.length; i++){
if(position == i){
dotViews[i].setSelected(true);
}else {
dotViews[i].setSelected(false);
}
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
獲取安裝的應用
private List<ResolveInfo> mApps;//應用的數量
private void loadApps() {
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// mainIntent.addCategory(Intent.CATEGORY_CAR_MODE);
mApps=getActivity().getPackageManager().queryIntentActivities(mainIntent, 0);
}
//根據應用數動態生成頁面
inflater = LayoutInflater.from(getContext());
//總的頁數=總數/每頁數量，并取整
pageCount = (int) Math.ceil(mApps.size() * 1.0 / pageSize);
mPagerList = new ArrayList<View>();
for (int i = 0; i < pageCount; i++) {
//每個頁面都是inflate出一個新實例
GridView gridView = (GridView) inflater.inflate(R.layout.gridview, viewPager, false);
gridView.setSelector(new ColorDrawable(Color.TRANSPARENT));//取消GridView中Item選中時默認的背景色
gridView.setAdapter(new GridViewAdapter(getContext(), mApps, i, pageSize));
mPagerList.add(gridView);
//跳轉相應的apk
final int finalI = i;
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
int pos = position + finalI * pageSize;
Log.e("pos ", "==="+pos);
try {
ResolveInfo info = mApps.get(pos);
//該應用的包名
String pkg = info.activityInfo.packageName;
//應用的主activity類
String cls = info.activityInfo.name;
ComponentName componet = new ComponentName(pkg, cls);
Intent i = new Intent();
i.setComponent(componet);
startActivity(i);
} catch (Exception e) {
e.printStackTrace();
}
// Toast.makeText(getContext(), mDatas.get(pos).getName(), Toast.LENGTH_SHORT).show();
}
});
GridView適配器
public class GridViewAdapter extends BaseAdapter {
Context context;
private List<ResolveInfo> mApps;
private LayoutInflater inflater;
/**
* 頁數下標,從0開始(當前是第幾頁)
*/
private int curIndex;
/**
* 每一頁顯示的個數
*/
private int pageSize;
public GridViewAdapter(Context context, List<ResolveInfo> mApps, int curIndex, int pageSize) {
inflater = LayoutInflater.from(context);
this.mApps = mApps;
this.curIndex = curIndex;
this.pageSize = pageSize;
this.context=context;
}
@Override
public int getCount() {
return mApps.size() > (curIndex + 1) * pageSize ? pageSize : (mApps.size() - curIndex * pageSize);
}
@Override
public Object getItem(int position) {
return mApps.get(position + curIndex * pageSize);
}
@Override
public long getItemId(int position) {
return position + curIndex * pageSize;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_gridview, parent, false);
viewHolder = new ViewHolder();
viewHolder.tv = (TextView) convertView.findViewById(R.id.textView);
viewHolder.iv = (ImageView) convertView.findViewById(R.id.imageView);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
/**
* 在給View綁定顯示的數據時，計算正確的position = position + curIndex * pageSize
*/
int pos = position + curIndex * pageSize;
ResolveInfo info = mApps.get(pos);
viewHolder.tv.setText(info.activityInfo.loadLabel(context.getPackageManager()));
// viewHolder.tv.setText("app");
Log.e( "getView: ","======="+info.activityInfo.loadLabel(context.getPackageManager()) );
//viewHolder.iv.setImageResource(R.mipmap.ic_launcher);
viewHolder.iv.setImageDrawable(info.activityInfo.loadIcon(context.getPackageManager()));
return convertView;
}
class ViewHolder {
public TextView tv;
public ImageView iv;
}
}
ViewPager適配器
public class ViewPagerAdapter extends PagerAdapter {
private List<View> mViewList;
public ViewPagerAdapter(List<View> mViewList) {
this.mViewList = mViewList;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(mViewList.get(position));
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(mViewList.get(position));
return (mViewList.get(position));
}
@Override
public int getCount() {
if (mViewList == null)
return 0;
return mViewList.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
}