java - 背景图像导致帧被跳过

Question

我有一个非常简单的应用程序，只有一个 TextView 和 RelativeLayout 内的 Button (带有背景图像):

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
    android:background="@drawable/background_image" >

    <!-- text in top left of background -->
    <TextView android:text="App" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <!-- primary button that outputs audio -->
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Text
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:onClick="trueButtonClick" />

</RelativeLayout>

onClick 事件仅播放一些音频:

public void trueButtonClick(View v) {
    //create media player
    MediaPlayer mp = MediaPlayer.create(this, R.raw.audio_test);
    //make noise
    mp.start();
}

在 logcat 中，我收到以下消息:

03-02 23:41:40.063    1910-1910/com.example.mohammad.trueapp E/MediaPlayer﹕ Should have subtitle controller already set 
03-02 23:41:40.063    1910-1910/com.example.mohammad.trueapp I/Choreographer﹕ Skipped 210 frames!  The application may be doing too much work on its main thread.
03-02 23:41:43.961    1910-1910/com.example.mohammad.trueapp I/Choreographer﹕ Skipped 232 frames!  The application may be doing too much work on its main thread. 
03-02 23:45:05.506    1910-1910/com.example.mohammad.trueapp I/Choreographer﹕ Skipped 115 frames!  The application may be doing too much work on its main thread. 
03-02 23:45:07.279    1910-1910/com.example.mohammad.trueapp E/MediaPlayer﹕ Should have subtitle controller already set 
03-02 23:45:07.323    1910-1910/com.example.mohammad.trueapp I/Choreographer﹕ Skipped 108 frames!  The application may be doing too much work on its main thread. 
03-02 23:45:10.490    1910-1910/com.example.mohammad.trueapp E/MediaPlayer﹕ Should have subtitle controller already set

当我删除背景图像@drawable/background_image时，应用程序速度加快。然而，添加背景图像后，应用程序变得非常慢，从用户的角度来看，它似乎已经崩溃了。背景图像尺寸为1040x851。有没有办法可以加快速度以防止严重滞后？

Answer 1

发生这种情况是因为您正在加载大尺寸图像。尝试优化其分辨率。

1px = 4 字节内存

通过这个你可以知道你的应用占用了多少内存