///*布局
<?xml version="1.0" encoding="utf-8"?>RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”
xmlns:app=“http://schemas.android.com/apk/res-auto”
xmlns:tools=“http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
android:background="@mipmap/f"
tools:context=".MainActivity">
<Button
android:id="@+id/Btn_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="54dp"
android:background="#248e6e"
android:text="立即体验" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:text="TextView" />
/RelativeLayout>
//MainActivity
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button Btn_send;
private TextView textView;
private int index=3;
private Handler mHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
if(index==0){
Intent in=new Intent(MainActivity.this,Main2Activity.class);
startActivity(in);
finish();
}else{
index--;
textView.setText(index+"s");
sendEmptyMessageDelayed(0,1000);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
mHandler.sendEmptyMessage(0);
}
private void initView() {
Btn_send = (Button) findViewById(R.id.Btn_send);
textView = (TextView) findViewById(R.id.textView);
Btn_send.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.Btn_send:
Intent in=new Intent(MainActivity.this,Main2Activity.class);
startActivity(in);
finish();
mHandler.removeCallbacksAndMessages(null);
break;
}
}
}