< RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"

xmlns:tools = "http://schemas.android.com/tools"

android:layout_width = "match_parent"

android:layout_height = "match_parent" >

android:id = "@+id/double_test"

android:layout_width = "50dp"

android:layout_height = "50dp"

android:background = "#FF00FF" />

</ RelativeLayout >

public class MainActivity extends Activity {

private long [] mHits = new long [ 2 ]; //存储时间的数组

@Override

protected void onCreate(Bundle savedInstanceState) {

super .onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

View view=findViewById(R.id.double_test);

view.setOnClickListener( new OnClickListener() {

@Override

public void onClick(View v) {

//实现数组的移位操作，点击一次，左移一位，末尾补上当前开机时间（cpu的时间）

System.arraycopy(mHits, 1 , mHits, 0 , mHits.length - 1 );

mHits[mHits.length - 1 ] = SystemClock.uptimeMillis();

//双击事件的时间间隔500ms

if (mHits[ 0 ] >= (SystemClock.uptimeMillis() - 500 )) {

Toast.makeText(MainActivity. this , "双击事件！！！" , 0 ).show();

【Flutter】packages思维以及使用Java添加Android平台特定的实现在Flutter框架里的体现和运用