Start Activity from different Application (APK)-CodePudding

I have Two Applications AppOne & AppTwo

App Two has activity as the following:

    <activity android:name=".AppTwoActivity">
        <intent-filter>
            <action android:name="com.myAction.TestAction"></action>
            <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
    </activity>

What I should do to lunch AppTwoActivity from AppOne (Different App)?

button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // Intent
            Intent intent  = new Intent();
            startActivity(intent);
        }
    });

CodePudding user response：

Add the below code to the manifest of your App One. Replace the name with your second apps package name.

<queries>
    <package android:name="second.app.package.name" />
</queries>

Then launch that activity using the code below. Or you can use @CommonsWare answer too.

Intent intent = new Intent();                 
intent.setClassName("second.app.package.name", "second.app.package.name.ActivityName");
startActivity(intent);

CodePudding user response：

Use an Intent that will resolve to the other app's activity:

button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // Intent
            Intent intent  = new Intent("com.myAction.TestAction");
            
            try {
                startActivity(intent);
            } catch (Throwable t) {
                Log.e("AppOne", "Exception starting AppTwo", t);

                // TODO something to let the user know that the other app is not installed or we otherwise cannot start the activity
            }
        }
    });