Android 中沉浸式状态栏实现

1. 计算状态栏高度及调用沉浸式状态栏的相关API方法

package com.example.status;

import android.annotation.TargetApi;

import android.app.Activity;

import android.content.Context;

import android.os.Build;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

public class ImmersedStatusbarUtils {



    /**

     * 在{@link Activity#setContentView}之后调用

     *

     * @param activity

     *            要实现的沉浸式状态栏的Activity

     * @param titleViewGroup

     *            头部控件的ViewGroup,若为null,整个界面将和状态栏重叠

     */

    @TargetApi(Build.VERSION_CODES.KITKAT)

    public static void initAfterSetContentView(Activity activity,

            View titleViewGroup) {

        if (activity == null)

            return;

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

            Window window = activity.getWindow();

            window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);

        }

        if (titleViewGroup == null)

            return;

        // 设置头部控件ViewGroup的PaddingTop,防止界面与状态栏重叠

        int statusBarHeight = getStatusBarHeight(activity);

        titleViewGroup.setPadding(0, statusBarHeight, 0, 0);

    }

    /**

     * 获取状态栏高度

     *

     * @param context

     * @return

     */

    private static int getStatusBarHeight(Context context) {

        int result = 0;

        int resourceId = context.getResources().getIdentifier(

                "status_bar_height", "dimen", "android");

        if (resourceId > 0) {

            result = context.getResources().getDimensionPixelSize(resourceId);

        }

        return result;

    }

}
2. 调用实例，使用步骤一编写的相关方法。

package com.example.status;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.view.Window;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.activity_main);

        View topView = findViewById(R.id.lin);

        ImmersedStatusbarUtils.initAfterSetContentView(this, topView);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}
对应的布局文件

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >


        android:id="@+id/lin"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:background="#ff123654" >


            android:id="@+id/title"

            android:layout_width="match_parent"

            android:layout_height="45.0dp"

            android:background="#ff123654"

            android:gravity="center"

            android:text="我是头部控件"

            android:textColor="#ffffffff" />

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