【Android通讯】Android线程间通讯

Android程序中，线程分为主线程（UI thread）和工作线程（work thread）。

我们要遵循单线程模型原则：UI操作非线程安全，且必须在UI thread进行。

1、多线程任务开发可以通过以下几个方式实现：

Handler

AsyncTask

详见：http://blog.csdn.net/QQ_29266921/article/details/54893254

2、如果子线程的数据想通知到UI线程中，可以一下的实现方法：

上述的三种方法    

Activity.runOnUIThread(Runnable)

runOnUiThread(new Runnable(){//更新UI                    @Override                    public void run() {                        publish_time.setText("更新失败");                    }                                    });
View.post(Runnable)或者new Handler().post()
View.postDelayed(Runnable, long)或者new Handler().postDelayed(Runnable, long)
3.管道流（不常用），管道为两个线程建立一个单向的通道。生产者PipedWriter负责写数据，消费者PipedReader负责读取数据。感觉很繁琐，不想用。
public class PipeExampleActivity extends Activity {	PRivate static final String TAG = "PipeExampleActivity";	private EditText editText;	PipedReader r;	PipedWriter w;	private Thread workerThread;	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		r = new PipedReader();		w = new PipedWriter();		try {			w.connect(r);		} catch (IOException e) {			e.printStackTrace();		}		setContentView(R.layout.activity_pipe);		editText = (EditText) findViewById(R.id.edit_text);		editText.addTextChangedListener(new TextWatcher() {			@Override			public void beforeTextChanged(CharSequence charSequence, int start, int count, int after) {			}			@Override			public void onTextChanged(CharSequence charSequence, int start, int before, int count) {				try {					if(count > before) {						w.write(charSequence.subSequence(before, count).toString());					}				} catch (IOException e) {					e.printStackTrace();				}			}			@Override			public void afterTextChanged(Editable editable) {			}		});		workerThread = new Thread(new TextHandlerTask(r));		workerThread.start();	}	@Override	protected void onDestroy() {		super.onDestroy();		workerThread.interrupt();		try {			r.close();			w.close();		} catch (IOException e) {		}	}	private static class TextHandlerTask implements Runnable {		private final PipedReader reader;		public TextHandlerTask(PipedReader reader){			this.reader = reader;		}		@Override		public void run() {			while(!Thread.currentThread().isInterrupted()){				try {					int i;					while((i = reader.read()) != -1){						char c = (char) i;												Log.d(TAG, "char = " + c);					}				} catch (IOException e) {					e.printStackTrace();				}			}		}	}}
4.共享内存（不常用，除非存在高并发，例如火车票之类的APP）
synchronized(this) {    while(isConditionFullfilled == false) {        wait();    }    notify();}3、4请参考：http://www.tuicool.com/articles/7NZnayB