[置顶] Android完美实现kitkat透明导航效果

完美实现Android4.4的透明状态栏效果

不多说 代码奉上:(注意要使用noActionbar)

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //这两句为关键所在 第一个是使状态栏透明化 第二个是使窗体不受限制
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
        //-----------------------------------------------------
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar viewById = (Toolbar) findViewById(R.id.toolbar);
        viewById.setTitle("nihao");
        setSupportActionBar(viewById);
    }
}

布局页面没什么(贴出来大家看看把)

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipToPadding="true"
    >
    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true">
        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            >
            <ImageView
                android:layout_width="match_parent"
                android:layout_height="300dp"
                android:scaleType="fitXY"
                android:src="@mipmap/am"
                app:layout_scrollFlags="scroll|exitUntilCollapsed" />
            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_scrollFlags="enterAlways|scroll"
                android:overScrollMode="always"
                />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

</android.support.design.widget.CoordinatorLayout>

百度知道上我看到和我的不一样!并解决了越界的问题
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;
    }
}
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
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/lin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#ff123654" >

        <TextView
            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" />
    </LinearLayout>

</LinearLayout>

Android 中沉浸式状态栏实现