Android - 覆盖屏幕包括状态栏内容

Question

我想制作一个覆盖整个屏幕的覆盖屏幕，包括状态栏和导航栏。

我花了几个小时谷歌搜索/研究仍然没有运气。

这是我的代码:

MainActivity.java(启动器):

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(由 MainActivity 启动):

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(仅添加了android:theme="@style/Theme.Transparent"，其余自动生成):

<?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>

样式.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>

启动时的截图，确实成功覆盖了整个屏幕，包括状态栏和导航栏，但是状态栏内容(例如时钟，电池状态)不见了:

当我按回键关闭 Overlay Activity 时，状态栏内容又回来了:

我想要覆盖状态栏而不删除内容，我应该怎么做？

Answer 1

自从你发帖后我就试过了，并想到了这个，

在 Manifest.xml 中 <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);
    }


}

充气机.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>

功能正常，根据您的要求进行调整。将代码添加到View和 Gone我评论的地方的状态栏。

编辑:你不需要这个，但正如你所说你得到的是空指针我也添加了这个。它对你没有用，只是为了避免错误，这是你的activity_main不是我的。现在，如果您无法修复它，请将其添加为您的 activity_main也是。(根据需要更改它)

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>

享受

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