Android 子线程测试

private volatile boolean mStopped = false;
private int i;
TextView tv1;
TextView tv2; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3); tv1 = (TextView) findViewById(R.id.tv1);
tv2 = (TextView) findViewById(R.id.tv2); Button button4 = (Button) findViewById(R.id.button4); //获取“开始”按钮
Button button5 = (Button) findViewById(R.id.button5); //获取“停止”按钮 //开始按钮
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if( mStopped = true) {
mStopped = false;
Log.i("主线程ID", String.valueOf(Thread.currentThread().getId()));
Log.i("主线程var", String.valueOf(Thread.currentThread().getName())); fgetsum(String.valueOf("mytv1"), 1);
fgetsum(String.valueOf("mytv2"), 2);
}
}
}); //结束线程按钮
button5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mStopped = true;
}
}); } //定义Handler 消息处理类,Handler 允许发送和处理 Message 或 Rannable 对像到其所在线程的 MessageQueue中
//Handler接收Message通知，并刷新tv1
//一般在这里刷新UI
final Handler handler2 = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case 0x101:
tv1.setText(String.valueOf(msg.obj.toString()));
break;
case 0x102:
tv2.setText(String.valueOf(msg.obj.toString()));
break;
default:
tv1.setText(String.valueOf("未知msg.what"));
break;
} }
}; //定义Runnable接口
//在子线程中发送Message给Handler
//Runnable不会在UI运行，所以在这里不能直接修改UI对象属性
private void fgetsum(final String strname, final int tvid) {
Thread thread = new Thread() {
@Override
public void run() { while (mStopped == false) {
i++;
try {
Thread.sleep(1000);
Log.i("子线程ID" + strname, String.valueOf(Thread.currentThread().getId()));
Log.i("子线程名" + strname, String.valueOf(Thread.currentThread().getName())); Message message = handler2.obtainMessage();
message.arg1 = tvid;
//如果tvid=1传入时间，否则传入i
if(tvid==1){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss", Locale.getDefault());
message.what=0x101;
message.obj = String.valueOf(sdf.format(new Date()));
}else{
message.what=0x102;
message.obj =i;
} handler2.sendMessage(message);
} catch (InterruptedException e) {
e.printStackTrace();
}
} }
};
thread.start();
thread = null;
}