1、在style.xml中定義toolbar的顏色

<resources>

    <!-- Base application theme. -->
    <style name="AppBaseTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <!-- toolbar（actionbar）顏色 -->
        <item name="colorPrimary">#4876FF</item>
        <item name="android:windowTranslucentStatus">true</item>
    </style>

    <style name="AppTheme" parent="@style/AppBaseTheme"></style>

</resources>
 

    android:fitsSystemWindows="true"
    android:clipToPadding="true"

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

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        Window window = getWindow();
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        //獲取樣式中的屬性值
        TypedValue typedValue = new TypedValue();
        this.getTheme().resolveAttribute(android.R.attr.colorPrimary, typedValue, true);
        int[] attribute = new int[] { android.R.attr.colorPrimary };
        TypedArray array = this.obtainStyledAttributes(typedValue.resourceId, attribute);
        int color = array.getColor(0, Color.TRANSPARENT);
        array.recycle();

        window.setStatusBarColor(color);
    }

    setContentView(R.layout.activity_main);

}