android: Handle Application Crash and start a particular Activity

Question

I have an app and if the app crashes in a particular activity, it restarts at one of the intermediate parent activities.

This is a problem for me since I have some

Answer 1

Proposed Solution 1 -

Add this tag android:clearTaskOnLaunch="true" in the manifest.xml file to your main activity which should always launch.

Probable Reason why it did not work

When the application crashes, it throws an Exception and we need to handle the Exception and otherwise we would not get the expected behavior

Proposed Solution 2

Try to handle any uncaught Exception and tell the system what to do. To implement this, try the below steps.

1. Create a class extending Application Class
2. Handle uncaughtException in your Application subclass.
3. In your launcher Activity, call your Application class.
4. After catching an Exception, start your main Activity (as per your requirement).

Code Sample

Step 1 and 2

package com.casestudy.intentsandfilter;

import android.app.Application;
import android.content.Intent;

public class MyApplication extends Application
{
    @Override
    public void onCreate() {

        super.onCreate();

        Thread.setDefaultUncaughtExceptionHandler(
            new Thread.UncaughtExceptionHandler() {
                @Override
                public void uncaughtException (Thread thread, Throwable e) {
                    handleUncaughtException (thread, e);
                }
            });
    }

    private void handleUncaughtException (Thread thread, Throwable e) {

        // The following shows what I'd like, though it won't work like this.
        Intent intent = new Intent (getApplicationContext(),DrawView.class);
        startActivity(intent);

        // Add some code logic if needed based on your requirement
    }
}

Step 3

public class MainActivity extends Activity {

    protected MyApplication app;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        // Get the application instance
        app = (MyApplication)getApplication();

        .............
    }
}

Step 4

Modify the below method as per your requirement

private void handleUncaughtException (Thread thread, Throwable e) {

    // The following shows what I'd like, though it won't work like this.
    Intent intent = new Intent (getApplicationContext(), HomeActivity.class);
    startActivity(intent);

    // Add some code logic if needed based on your requirement
}