private TextView textView;static boolean showtime=true;private android.os.Handler handler=new android.os.Handler(){ public void handleMessage(Message msg){ switch (msg.what){ case 0x123: textView.setText(msg.obj.toString());break; case 0x1234: textView.setText("OK?");break; default:break; } }};
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_first);
Button button=(Button)findViewById(R.id.button_top);textView=(TextView)findViewById(R.id.text_top);final Thread threadShowTime=new Thread(new Runnable() { @Override public void run() { while (true) { try { Thread.sleep(1000); Message msg = new Message(); msg.what = 0x123; msg.obj = new Date().toString(); Message msg1=new Message(); msg1.what=0x1234; if(showtime) handler.sendMessage(msg); else handler.sendMessage(msg1); } catch (InterruptedException e) { e.printStackTrace(); } } }});button.setOnClickListener(new View.OnClickListener(){ public void onClick(View v) { threadShowTime.start(); if (showtime) { showtime = false; String s=String.valueOf(showtime); Toast.makeText(FirstActivity.this,s,Toast.LENGTH_SHORT).show(); } else { threadShowTime.interrupt(); showtime = true; String s=String.valueOf(showtime); Toast.makeText(FirstActivity.this,s,Toast.LENGTH_SHORT).show(); } }});
转载于:https://www.cnblogs.com/dreammaker-K/p/6605843.html
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