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How to get current foreground activity context in Android?
This example demonstrate about How to get current foreground activity context in Android
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to src/MyApp.java
package app.tutorialspoint.com.sample ;
import android.app.Activity ;
import android.app.Application ;
public class MyApp extends Application {
private Activity mCurrentActivity = null;
@Override
public void onCreate () {
super .onCreate() ;
}
public Activity getCurrentActivity () {
return mCurrentActivity ;
}
public void setCurrentActivity (Activity mCurrentActivity) {
this . mCurrentActivity = mCurrentActivity ;
}
}Step 3 − Add the following code to src/MyBaseActivity.java
package app.tutorialspoint.com.sample ;
import android.app.Activity ;
import android.os.Bundle ;
import android.support.v7.app.AppCompatActivity ;
public class MyBaseActivity extends AppCompatActivity {
protected MyApp mMyApp ;
public void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState) ;
mMyApp = (MyApp) this .getApplicationContext() ;
}
protected void onResume () {
super .onResume() ;
mMyApp .setCurrentActivity( this ) ;
}
protected void onPause () {
clearReferences() ;
super .onPause() ;
}
protected void onDestroy () {
clearReferences() ;
super .onDestroy() ;
}
private void clearReferences () {
Activity currActivity = mMyApp .getCurrentActivity() ;
if ( this .equals(currActivity))
mMyApp .setCurrentActivity( null ) ;
}
}Step 4 − Add the following code to src/MainActivity.java
package app.tutorialspoint.com.sample ;
import android.app.Activity ;
import android.support.v7.app.AppCompatActivity ;
import android.os.Bundle ;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState) ;
setContentView(R.layout. activity_main ) ;
Activity currentActivity = ((MyApp)
getApplicationContext()).getCurrentActivity() ;
}
}Step 5 − Add the following code to androidManifest.xml
<? xml version= "1.0" encoding= "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package= "app.tutorialspoint.com.sample" > <uses-permission android :name= "android.permission.CALL_PHONE" /> <application android :name= ".MyApp" android :allowBackup= "true" android :icon= "@mipmap/ic_launcher" android :label= "@string/app_name" android :roundIcon= "@mipmap/ic_launcher_round" android :supportsRtl= "true" android :theme= "@style/AppTheme" > <activity android :name= ".MainActivity" > <intent-filter> <action android :name= "android.intent.action.MAIN" /> <category android :name= "android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android :name= ".MyBaseActivity" /> </application> </manifest>
Updated on: 30-Jul-2019
5K+ Views
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