1. 去掉標題欄+全屏顯示+導航欄半透明

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // todo 去掉標題欄
        supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        // todo 全屏顯示以及導航欄半透明
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // todo 還原設定
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }
}
 

2. 去掉標題欄+全屏顯示+設定導航欄顏色

public class MainActivity extends AppCompatActivity {

    private int mNavigationBarColor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // todo 去掉標題欄
        supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        // todo 全屏顯示
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // todo 設定導航欄顏色
        mNavigationBarColor = getWindow().getNavigationBarColor();
        getWindow().setNavigationBarColor(Color.TRANSPARENT);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // todo 還原設定
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getWindow().setNavigationBarColor(mNavigationBarColor);
    }
}
 

3. 對DecorView進行設定

public class MainActivity extends AppCompatActivity {

    private int mSystemUiVisibility;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        View decorView = getWindow().getDecorView();
        // todo 獲取當前的ui狀態
        mSystemUiVisibility = decorView.getSystemUiVisibility();
        // todo 全屏
        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // todo 還原ui狀態
        View decorView = getWindow().getDecorView();
        decorView.setSystemUiVisibility(mSystemUiVisibility);
    }
}
 

4. 清單檔案設定主題

1. 在/res/values/styles.xml中自定義全屏主題

    <style name="FullScreen" parent="Theme.AppCompat.Light.NoActionBar">
        <!--視窗全屏-->
        <item name="android:windowFullscreen">true</item>
        <!--導航欄半透明-->
        <item name="android:windowTranslucentNavigation">true</item>
    </style>

2. 在清單檔案中設定主題

        <activity
            android:name=".MainActivity"
            android:theme="@style/FullScreen">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>