使用handler发送消息
public static final int msgKey1=1;
private Handler mHandler=new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what){
case msgKey1:
long sysTime = System.currentTimeMillis();
CharSequence format = DateFormat.format("hh:mm:ss", sysTime);
tvTime.setText(format);
break;
}
}
};
创建内部类 内部线程 睡眠1秒后立马进行操作
public class TimeThread extends Thread {
@Override
public void run() {
do {
try {
Thread.sleep(1000);
Message msg = new Message();
msg.what=msgKey1;
mHandler.sendMessage(msg);
} catch (InterruptedException e) {
e.printStackTrace();
}
}while (true);
}
}
主函数
private TextView tvTime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//隐藏标题
getSupportActionBar().hide();
tvTime = (TextView) findViewById(R.id.myTime);
new TimeThread().start();
}
布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:background="#666"
android:layout_height="match_parent"
tools:context="com.example.suoping.MainActivity">
<TextView
android:padding="15dp"
android:id="@+id/myTime"
android:textColor="#fff"
android:textStyle="bold"
android:textSize="26sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="12:50" />
<TextView
android:text="上滑解锁"
android:textColor="#fff"
android:textSize="26sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/myTime"
android:layout_marginLeft="15dp"
android:layout_marginTop="47dp"
android:id="@+id/textView" />
</RelativeLayout>