In main activity, override onFling() to switch to SecondActivity if Swipe left Gestures detected.
package com.example.androidswipeactivity;
import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.app.ActionBarActivity;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.Toast;
import android.content.Intent;
import android.os.Bundle;
public class MainActivity extends ActionBarActivity {
private GestureDetectorCompat gestureDetectorCompat;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gestureDetectorCompat = new GestureDetectorCompat(this, new MyGestureListener());
}
@Override
public boolean onTouchEvent(MotionEvent event) {
this.gestureDetectorCompat.onTouchEvent(event);
return super.onTouchEvent(event);
}
class MyGestureListener extends GestureDetector.SimpleOnGestureListener {
//handle 'swipe left' action only
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
/*
Toast.makeText(getBaseContext(),
event1.toString() + "\n\n" +event2.toString(),
Toast.LENGTH_SHORT).show();
*/
if(event2.getX() < event1.getX()){
Toast.makeText(getBaseContext(),
"Swipe left - startActivity()",
Toast.LENGTH_SHORT).show();
//switch another activity
Intent intent = new Intent(
MainActivity.this, SecondActivity.class);
startActivity(intent);
}
return true;
}
}
}
/res/layout/activity_main.xml, layout for MainActivity
<LinearLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
android:background="@color/background_material_dark"
tools:context="com.example.androidswipeactivity.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/ic_launcher"/>
</LinearLayout>
SecondActivity.java, second activity, override onFling() to switch to finish() if Swipe right Gestures detected. It create ContentView using java code without xml.
package com.example.androidswipeactivity;
import android.os.Bundle;
import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.app.ActionBarActivity;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.TextView;
import android.widget.Toast;
public class SecondActivity extends ActionBarActivity {
private GestureDetectorCompat gestureDetectorCompat;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView text2ndActivity = new TextView(this);
text2ndActivity.setText("Second Activity");
setContentView(text2ndActivity);
gestureDetectorCompat = new GestureDetectorCompat(this, new My2ndGestureListener());
}
@Override
public boolean onTouchEvent(MotionEvent event) {
this.gestureDetectorCompat.onTouchEvent(event);
return super.onTouchEvent(event);
}
class My2ndGestureListener extends GestureDetector.SimpleOnGestureListener {
//handle 'swipe right' action only
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
/*
Toast.makeText(getBaseContext(),
event1.toString() + "\n\n" +event2.toString(),
Toast.LENGTH_SHORT).show();
*/
if(event2.getX() > event1.getX()){
Toast.makeText(getBaseContext(),
"Swipe right - finish()",
Toast.LENGTH_SHORT).show();
finish();
}
return true;
}
}
}
Make sure to modify AndroidManifest.xml to add <activity> of SecondActivity.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidswipeactivity"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity"
android:label="@string/app_name" >
</activity>
</application>
</manifest>
Download the files.
Next:
- Swipe to Slide animated activity switching
2 comments:
Works like a charm, i forget to Override a onTouchEvent()
Easy and clean , thanx
Post a Comment