android动态显示时间,Android 动态显示时间
package code.example.newcodeview;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.text.format.DateFormat;import android.widget.TextView;import android.app.Ac
package code.example.newcodeview;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.format.DateFormat;
import android.widget.TextView;
import android.app.Activity;
public class MainActivity extends Activity {
private static final int msgKey = 1;
private TextView txtTime;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtTime = (TextView) findViewById(R.id.txtSystemtime);
new TimeThread().start();
}
public class TimeThread extends Thread {
@Override
public void run() {
do {
try {
Thread.sleep(1000);
Message msg = new Message();
msg.what = msgKey;
mHandler.sendMessage(msg);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (true);
}
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case msgKey:
long sysTime = System.currentTimeMillis();
CharSequence sysTimeStr = DateFormat
.format("hh:mm:ss", sysTime);
txtTime.setText("北京时间:" + sysTimeStr);
break;
default:
break;
}
}
};
}
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