我搜索了文档,但只找到了这个: 链接。这是用来使酒吧半透明?我想做的是使状态栏完全透明(如下图所示),并使它向后兼容APK<19:

我的styles.xml:

<resources xmlns:tools="http://schemas.android.com/tools">

  <style name="AppTheme" parent="Theme.AppCompat.Light">
  <item name="android:actionBarStyle">@style/ThemeActionBar</item>
  <item name="android:windowActionBarOverlay">true</item>
  <!-- Support library compatibility -->
  <item name="actionBarStyle">@style/ThemeActionBar</item>
  <item name="windowActionBarOverlay">true</item>
  </style>

  <style name="ThemeActionBar" parent="Widget.AppCompat.Light.ActionBar.Solid">
  <item name="android:background"> @null </item>
  <!-- Support library compatibility -->
  <item name="background">@null</item>
  <item name="android:displayOptions"> showHome | useLogo</item>
  <item name="displayOptions">showHome|useLogo</item>

  </style>

</resources>

我能做的是:


当前回答

这仅适用于API级别>= 21。这对我很管用。 这是我的代码(Kotlin)

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        findViewById<View>(android.R.id.content).systemUiVisibility =
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
}

其他回答

这应该可以

//在Activity的onCreate()中为实例

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    Window w = getWindow();
    w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}

android:fitsSystemWindows="true"只适用于v21。我们可以在theme xml中设置,或者在父布局中设置,比如LinearLayout或CoordinateLayout。 对于v21以下,我们无法添加此标志。 请根据需要使用不同的style.xml文件创建不同的值文件夹。

这个解决方案是为那些谁想要一个完全透明的状态栏和导航栏不受影响。令人难以置信的是,这听起来如此简单,以至于导致包括我在内的不止一个人头疼。

这就是我所说的最终结果

结果

我们只需要两个函数,我建议在我们的活动的OnCreate中调用,第一个是setStatusBar(),这是负责使透明的同一个。

private fun setStatusBar() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    window.apply {
        clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
        addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            decorView.systemUiVisibility =
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
        } else {
            decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
        }
        statusBarColor = Color.TRANSPARENT
    }
}

第二个函数setedges()负责设置与顶部受限的视图相对应的边距,否则,这些视图将在StatusBar下面被看到。

private fun setMargins() {
    ViewCompat.setOnApplyWindowInsetsListener(
        findViewById(R.id.your_parent_view)
    ) { _, insets ->
        val view = findViewById<FrameLayout>(R.id.your_child_view)
        val params = view.layoutParams as ViewGroup.MarginLayoutParams
        params.setMargins(
            0,
            insets.systemWindowInsetTop,
            0,
            0
        )
        view.layoutParams = params
        insets.consumeSystemWindowInsets()
    }
}

最终代码看起来像这样:

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.your_layout))
        setStatusBar()
        setMargins()
}

private fun setStatusBar() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    window.apply {
        clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
        addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            decorView.systemUiVisibility =
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
        } else {
            decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
        }
        statusBarColor = Color.TRANSPARENT
    }
}

private fun setMargins() {
    ViewCompat.setOnApplyWindowInsetsListener(
        findViewById(R.id.your_parent_view)
    ) { _, insets ->
        val view = findViewById<FrameLayout>(R.id.your_child_view)
        val params = view.layoutParams as ViewGroup.MarginLayoutParams
        params.setMargins(
            0,
            insets.systemWindowInsetTop,
            0,
            0
        )
        view.layoutParams = params
        insets.consumeSystemWindowInsets()
    }
}

你可以在下面的文章中找到更详细的解释

我还留下了一个测试项目,这些概念在其中发挥作用。

这是Kotlin扩展:

fun Activity.transparentStatusBar() {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
        window.statusBarColor = Color.TRANSPARENT

    } else
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)

}

下面的代码将创建一个完全透明的状态栏:

package com.demo;

import android.app.Activity;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) {
            setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
        }
        if (Build.VERSION.SDK_INT >= 19) {
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        }
        if (Build.VERSION.SDK_INT >= 21) {
            setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
            getWindow().setStatusBarColor(Color.TRANSPARENT);
        }
    }

    public static void setWindowFlag(Activity activity, final int bits, boolean on) {
        Window win = activity.getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        if (on) {
            winParams.flags |= bits;
        } else {
            winParams.flags &= ~bits;
        }
        win.setAttributes(winParams);
    }
}