接觸Android約有半年時間了，雖然有兩年的java開發經驗，發現Android還是有很多需要學習的地方。有些知識點是第一次用到，簡單記錄下來，一方面加深印象，一方面供以后參考。
1.EventBus 1.0.1的使用
例：
(1) XX1.java 觸發EventBus事件；
RefreshUnReadEvent refreshUnReadEvent = new RefreshUnReadEvent();
refreshUnReadEvent.setFromUserid(resp.getFromUserId());
EventBus.getDefault().post(refreshUnReadEvent);
(2) XX2.java 注冊
EventBus.getDefault().register(this, "refreshUnRead", RefreshUnReadEvent.class);
(3) XX2.java 具體實現（此處的方法名需與注冊的“refreshUnRead”保持一致）
public void refreshUnReadMainThread(RefreshUnReadEvent event) {
//event.getFromUserid()
}
此處RefreshUnReadEvent 相當于傳統的javaBean，可利用其進行傳參。
2.推送通知
例：
//設置點擊 推送信息跳轉頁面
Intent intent = new Intent();intent.setClass(mContext, HomeActivity.class);intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);Bundle bundle = new
bundle.putString("fileId", message.getFromUserFileid());
bundle.putBoolean("isGroup", false);intent.putExtras(bundle);//固定顯示推送消息 為“您有一條新的消息” liuyangNotificationUtil.getInstance(mContext).notifyUserMessage("導購顧問", "您有一條新的消息", intent);
//具體推送操作
public void notifyUserMessage(String title, String content, Intent intent)
{
if (mNotificationManager == null)
{
mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
}
mNotification = new Notification(R.drawable.ic_launcher, content, System.currentTimeMillis());
mNotification.setLatestEventInfo(mContext, title, content, getPendingIntentForMessage(intent));
mNotification.flags |= Notification.FLAG_AUTO_CANCEL;//根據Notification.FLAG_AUTO_CANCEL 改變推送提示格式
mNotificationManager.notify(NOTIFICATION_ID, mNotification);// 發起通知
}
public PendingIntent getPendingIntentForMessage(Intent intent)
{
PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
return pendingIntent;
}
3.#廣播Broadcast
例：
(1) XX1.java
Intent clearUnreadIntent = new Intent(MTActions.CLEAR_CONVERSATION_UNREAD_COUNT_ACTION);
clearUnreadIntent.putExtra("conversationType", Constants.DISCUSSION_CONVERSATION);
clearUnreadIntent.putExtra("conversationId", discussion.getDiscussionId());
mContext.sendBroadcast(clearUnreadIntent);
(2) XX2.java
//操作
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (MTActions.CLEAR_CONVERSATION_UNREAD_COUNT_ACTION.equals(action)) {
//操作
}
}
｝
//注冊廣播
private void registerReceivers() {
IntentFilter filter = new IntentFilter();
filter.addAction(MTActions.CLEAR_CONVERSATION_UNREAD_COUNT_ACTION);
registerReceiver(mReceiver, filter);
｝
//注銷廣播
unregisterReceiver(mReceiver);
4.左劃刪除(SwipeMenuListView)
例：
//具體見github 有現成demo
//此處只做刪除操作，具體其它操作度娘
(1)
SwipeMenuCreator creator = new SwipeMenuCreator() {
@Override
public void create(SwipeMenu menu) {
// create "delete" item
SwipeMenuItem deleteItem = new SwipeMenuItem(
getApplicationContext());
// set item background
deleteItem.setBackground(new ColorDrawable(Color.rgb(0xF9,
0x3F, 0x25)));
// set item width
deleteItem.setWidth(dp2px(70));
// set a icon
deleteItem.setIcon(R.drawable.ic_delete);
// add to menu
menu.addMenuItem(deleteItem);
}
};
(2)
private SwipeMenuListView mListView;
mListView = (SwipeMenuListView) findViewById(R.id.lv_conversation);
mListView.setMenuCreator(creator);
mListView.setAdapter(mConversationListAdapter);
mListView.setOnItemClickListener(this);
mListView.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(int position, SwipeMenu menu, int index) {
switch (index) {
case 0://左劃刪除
deleteViewList(position);
refresh();
break;
}
return false;
}
});
5.無法打包或者部分手機不兼容(超過65536，部分Android系統自動分包)
(1)build.gradle文件
defaultConfig{
multiDexEnabled = true
}
dependencies {
//添加支持multidex的兼容包
compile 'com.android.support:multidex:1.0.0'
｝
(2)MTApplication.java文件
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(base);
}
6.定時（最大61秒，從61-11開始10秒內，每1秒執行一次）
CountDownTimer downTimer = new CountDownTimer(61000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
if (millisUntilFinished <= 11000 && millisUntilFinished > 0) {
record_rl.setVisibility(View.GONE);
rl_daojishi.setVisibility(View.VISIBLE);
record_daojishi_text.setText(millisUntilFinished / 1000 + "");
}
}
@Override
public void onFinish() {
rl_daojishi.setVisibility(View.GONE);
}
};
.
7.
//按住說話，提示需動態切換圖片 liuyang
Subscription subscription;
int position = 0;
int image[] = {R.drawable.img_yuyin1, R.drawable.img_yuyin2, R.drawable.img_yuyin3, R.drawable.img_yuyin};
private void changeMicro() {
if (subscription != null) {
return;
}
record_img.setImageResource(image[0]);
subscription = Observable.interval(300, TimeUnit.MILLISECONDS).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1<Long>() {
@Override
public void call(Long aLong) {
if (subscription != null && !subscription.isUnsubscribed()) {
record_img.setImageResource(image[position % image.length]);
position++;
}
}
});
}
//取消圖片切換
private void cancelMicro() {
if (subscription != null) {
subscription.unsubscribe();
subscription = null;
position = 0;
}
record_img.setImageResource(R.drawable.record_cancel);
}
8.高亮，鏈接
textMessage.setAutoLinkMask(Linkify.ALL);
9.Shader(盜用同事的文章)
[簡書]http://www.lxweimin.com/p/08cf25f51c73
