Android - overlay screen including status bar content

Question

I want to make an overlay screen which overlay entire screen including the status bar and navigation bar.

I spends few hours of Googling/research still no luck.

This is my code:

MainActivity.java (launcher):

package com.blogspot.diannaoxiaobai.myapplication;

import android.content.Intent;
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);

        startActivity(new Intent(this, Main2Activity.class));
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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"
    tools:context="com.blogspot.diannaoxiaobai.myapplication.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />
</RelativeLayout>

Main2Activity.java (launch by MainActivity):

package com.blogspot.diannaoxiaobai.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;

public class Main2Activity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        //getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        setContentView(R.layout.activity_main2);
    }
}

activity_main2.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main2"
    android:background="#99ed3636"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context="com.blogspot.diannaoxiaobai.myapplication.Main2Activity">
    <LinearLayout android:id="@+id/overlay_instruction"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:background="@android:color/transparent"
        android:clickable="true">

    </LinearLayout>
</LinearLayout>

AndroidManifest.xml (Only android:theme="@style/Theme.Transparent" added, the rest were auto generated):

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.blogspot.diannaoxiaobai.myapplication">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        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=".Main2Activity"
            android:theme="@style/Theme.Transparent"></activity>
    </application>

</manifest>

styles.xml:

<resources>
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="Theme.Transparent" parent="android:Theme.Holo.NoActionBar.Fullscreen">
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="colorPrimary">@android:color/transparent</item>
        <item name="colorPrimaryDark">@android:color/transparent</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:backgroundDimEnabled">false</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowTranslucentStatus">true</item>
        <item name="android:windowTranslucentNavigation">true</item>
    </style>

</resources>

The screenshot when launched, it did success to overlay entire screen including both status bar and navigation bar, but the status bar content(e.g. clock, battery status) was gone:

When I pressed back to dismissed Overlay Activity, the status bar content was come back:

What I wanted is overlay the status bar without remove the content, how should I do it ?

Answer 1

I tried this since you post and came up with this,

In Manifest.xml <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

 public class MainActivity extends AppCompatActivity {


    private WindowManager wm;
    private ViewGroup mTopView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        applyOverLay();


        mTopView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //set your status bar visible Here
                Toast.makeText(MainActivity.this, "Ding Ding ,I got a Click Removing overlay!!", Toast.LENGTH_SHORT).show();
                wm.removeViewImmediate(mTopView);

            }
        });

    }


    public void applyOverLay() {

        //set your status bar gone  Here
        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
                PixelFormat.TRANSLUCENT);

        wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);

        mTopView = (ViewGroup) getLayoutInflater().inflate(R.layout.inflator, null);
        getWindow().setAttributes(params);
        wm.addView(mTopView, params);
    }


}

inflator.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="25dp"
    android:background="#56FF0000"
    >
</LinearLayout>

Function works fine , adjust it as your requirements.Add codes to View and Gone status bar in the places that i commented.

Edit: you don't need this, but as you said you are getting null pointer i add this too.There is no use of it for you but only to avoid the error , Its your activity_main not mine. Now if you cant fix it add this as your activity_main too.(change it as you want)

activity_main.XML

<LinearLayout
    android:id="@+id/lin"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <View
        android:background="#65000000"
        android:id="@+id/view"
        android:layout_width="match_parent"
        android:layout_height="200dp" />

    <ImageView
        android:background="#739"
        android:layout_width="match_parent"
        android:layout_height="200dp" />

    <ImageView
        android:background="#789234"
        android:layout_width="match_parent"
        android:layout_height="200dp" />
</LinearLayout>

Enjoy

outputs: