1.style檔案中 去Title 狀態列透明

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
         ...
        <item name="windowNoTitle">true</item>
        <item name="android:windowTranslucentStatus"
 
>true</item>
    </style>

2.通過padding撐出來狀態列

    <android.support.v7.widget.Toolbar
        android:id="@+id/toobar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        ...
        android:fitsSystemWindows="true"
 

        android:paddingTop="@dimen/toolbar_padding_top"/>

3.在values, values-v19兩個資料夾內dimens.xml下分別宣告toolbar_padding_top變數，values資料夾下的值為0dp，而values-v19資料夾下的值為25dp.

<resources>
    <dimen name="toolbar_padding_top">25dp</dimen>
</resources>

4.程式碼中設定

public class MainActivity
 
 extends AppCompatActivity {
    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 經測試在程式碼裡直接宣告透明狀態列更有效
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            WindowManager.LayoutParams localLayoutParams = getWindow().getAttributes();
            localLayoutParams.flags = (WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS | localLayoutParams.flags);
        }
        initToolbar();
    }
    private void initToolbar() {
        Toolbar toolbar = (Toolbar) findViewById(R.id.tb);
        toolbar.setTitle("LynnRachel");
        if (toolbar != null) {
            setSupportActionBar(toolbar);
        }
    }
}

原始碼地址