Complete activity switching according to sliding

quote

Activity Jump encapsulation

First step ： take OnGestureListener Interface encapsulation

public class SlideListener implements android.view.GestureDetector.OnGestureListener {
    

    private Context context;
    private Class<? extends Activity> leftCls;
    private Class<? extends Activity> rightCls;

    public SlideListener(Context context, Class<? extends Activity> leftCls,Class<? extends Activity> rightCls) {
    
        this.context = context;
        this.leftCls = leftCls;
        this.rightCls = rightCls;
    }

    @Override
    public boolean onDown(MotionEvent e) {
    
        return true;
    }

    @Override
    public void onShowPress(MotionEvent e) {
    
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
    
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
                            float distanceY) {
    
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
    
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                           float velocityY) {
    
        int FLING_MIN_DISTANCE = 50;
        float FLING_MIN_VELOCITY = 50;
        if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
    
            // Scroll left , The right view shows 
            ActivityManager.goActivity(context, rightCls);
        } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
    
            // Slide to the right , Left side view display 
            ActivityManager.goActivity(context, leftCls);
        }
        return false;
    }
}

The second step ： initialization

public class MainActivity extends AppCompatActivity {
    
    GestureDetector gd;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gd = new GestureDetector(this, new SlideListener(this, LeftActivity.class,RightActivity.class));
    }
}

The third step ： Realization OnTouchListener Interface , And set up monitoring

public class MainActivity extends AppCompatActivity implements View.OnTouchListener{
    
    GestureDetector gd;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gd = new GestureDetector(this, new SlideListener(this, LeftActivity.class,RightActivity.class));
        ConstraintLayout layout = findViewById(R.id.layout);
        layout.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
    
        v.performClick();
        return gd.onTouchEvent(event);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:id="@+id/layout"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

Optimize

The above three steps can realize sliding switching , But it seems stiff without animation when switching , You can refer to

Activity Enter exit animation