Android dialer application

I am figuring out a way to replace the default dialer application from my custom dialer application, but I am not getting how to achieve this.

Here is what I want

• Create a custom dialer UI
• My application is called whenever call button hardware or that one in Android is pressed
• The application can also be called from the contact screen

I am referring to public static final String ACTION_DIAL.

1. Create a simple Android application (our dialer). To actually call someone, you just need that method:

   private void performDial(String numberString) {
       if (!numberString.equals("")) {
          Uri number = Uri.parse("tel:" + numberString);
          Intent dial = new Intent(Intent.ACTION_CALL, number);
          startActivity(dial);
       }
   }
   

2. Give your application permission to call in AndroidManifest

   <uses-permission android:name="android.permission.CALL_PHONE" />
   

3. Set in AndroidManifest intention that says to your phone to use your app when need a dialer

When someone press the call button:

    <intent-filter>
        <action android:name="android.intent.action.CALL_BUTTON" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>

When someone fire an URI:

    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <action android:name="android.intent.action.DIAL" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="tel" />
    </intent-filter>

This worked for me:

        <activity
        android:name=".activities.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

        <!-- open activity when establishing a call -->
        <intent-filter>
            <action android:name="android.intent.action.CALL_PRIVILEGED" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:scheme="tel" />
        </intent-filter>

    </activity>