内存不足：添加10KB ImageButtons后的堆大小错误

时间：2014-01-21 15:52:31

标签： android bitmap out-of-memory heap

我在Eclipse上工作的Android应用程序以启动画面开始（在完成一些研究后怀疑内存泄漏）。启动画面进入主菜单，其中包含7个按钮，这些按钮通向一些Java Applet。整个应用程序运行良好，直到我将7个虚拟（ImageButton）png图像更改为最终的7 png图像。这些png图像平均为10KB，并且不认为它们是问题的原因（因为它们很小），即使在我更改了ImageButtons的这些png图像后这个问题也开始了。

老实说，除了重新调整图像大小之外，我不知道从哪里开始，因为它们的设计有点大像素（不是内存）以适应不同的设备。但我认为这个问题有另一个解决方案，我作为一个初学者无法弄清楚。我希望有人可以帮我解决这个问题：）

以下是代码：

清单。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.letsfly.tryp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        android:debuggable="true" > 
        <activity
            android:name=".Splash"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.MAINACTIVITY" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Testing"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TESTING" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".trypOne"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TRYPONE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".trypTwo"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TRYPTWO" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".trypThree"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TRYPTHREE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".trypFour"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TRYPFOUR" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".trypFive"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.letsfly.tryp.TRYPFIVE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>


</manifest>

启动XML。

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"

    >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="600dp"
            android:layout_height="800dp"
            android:layout_gravity="center"
            android:layout_marginTop="-180px"
            android:contentDescription="@string/button1"
            android:padding="0px"
            android:src="@drawable/trypsplash" />

    </LinearLayout>

Splash Java。

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class Splash extends Activity {


    @Override
    protected void onCreate(Bundle waitFiveSeconds) {
        // TODO Auto-generated method stub

        requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        super.onCreate(waitFiveSeconds);
        setContentView(R.layout.splash);

        Thread timer = new Thread(){
            public void run(){
                try{
                    sleep(5000);
                }catch(InterruptedException e){
                    e.printStackTrace();

                }finally{
                    Intent openMenu = new 

Intent("com.letsfly.tryp.MAINACTIVITY");
                        startActivity(openMenu);

                }
            }
        };
        timer.start();
    }
}

MainActivity Java（按钮所在的位置）。

package com.letsfly.tryp;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;

public class MainActivity extends Activity {

    ImageButton button1;
    ImageButton button2;
    ImageButton button3;
    ImageButton button4;
    ImageButton button5;
    ImageButton button6;
    ImageButton button7;

    @Override
    protected void onCreate(Bundle savedInstanceState) {




        //replace yourActivity.this with your own activity or if you declared a context you can write context.getSystemService(Context.VIBRATOR_SERVICE);    

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        button1 = (ImageButton) findViewById(R.id.imageButton1);
        button2 = (ImageButton) findViewById(R.id.imageButton2);
        button3 = (ImageButton) findViewById(R.id.imageButton3);
        button4 = (ImageButton) findViewById(R.id.imageButton4);
        button5 = (ImageButton) findViewById(R.id.imageButton5);
        button6 = (ImageButton) findViewById(R.id.imageButton6);
        button7 = (ImageButton) findViewById(R.id.imageButton7);




        button1.setOnClickListener(new View.OnClickListener() {


            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent goToTrypOne = new Intent("com.letsfly.tryp.TRYPONE");
                startActivity(goToTrypOne);

            }
        });
        button2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent goToTrypTwo = new Intent("com.letsfly.tryp.TRYPTWO");
                startActivity(goToTrypTwo);


            }
        });
        button3.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent goToTrypThree = new Intent("com.letsfly.tryp.TRYPTHREE");
                startActivity(goToTrypThree);

            }
        });
        button4.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent goToTrypTwo = new Intent("com.letsfly.tryp.TRYPFOUR");
                startActivity(goToTrypTwo);

            }
        });
        button5.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent goToTrypFive = new Intent("com.letsfly.tryp.TRYPFIVE");
                startActivity(goToTrypFive);

            }
        });
        button6.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

            }

        });
        button7.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

            }

        });

    }


    @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;
    }

}

MainActivity XML。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:gravity="center"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"

    tools:context=".MainActivity" >

   <ImageButton
        android:id="@+id/imageButton1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button1"
        android:src="@drawable/button1"
        android:layout_weight="1"
        android:layout_gravity="center"/>
    <ImageButton
        android:id="@+id/imageButton2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button2"
        android:src="@drawable/button2"
        android:layout_weight="1"
        android:layout_gravity="center" />
    <ImageButton
        android:id="@+id/imageButton3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button3"
        android:src="@drawable/button3"
        android:layout_weight="1"
        android:layout_gravity="center" />
    <ImageButton
        android:id="@+id/imageButton4"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button4"
        android:src="@drawable/button4"
        android:layout_weight="1"
        android:layout_gravity="center" />
    <ImageButton
        android:id="@+id/imageButton5"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/button5"
        android:contentDescription="@string/button5"
        android:layout_weight="1"
        android:layout_gravity="center" />
    <ImageButton
        android:id="@+id/imageButton6"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button6"
        android:src="@drawable/button6"
        android:layout_weight="1"
        android:layout_gravity="center" />
    <ImageButton
        android:id="@+id/imageButton7"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/button7"
        android:src="@drawable/button7"
        android:layout_weight="1"
        android:layout_gravity="center" />

</LinearLayout>

1 个答案:

答案 0 :(得分：1)

实际上像素是大的问题，因为Android需要将压缩的png放入内存中未压缩的位图以显示它们。

而不是制作缩小以容纳不同尺寸/密度设备的大型png，而是使用具有不同限定符的可绘制文件夹：

Images for mdpi devices: /res/drawable-mdpi
Images for hdpi devices: /res/drawable-hdpi
Images for xhdpi devices: /res/drawable-xhdpi
Images for xxhdpi devices: /res/drawable-xxhdpi

当您请求图像（例如，R.drawable.myImage）时，它将在具有与设备最匹配的密度限定符的文件夹中查找myImage文件。这使您可以自动确保小密度设备使用的内存占用量较小的图像。

更多信息： http://developer.android.com/guide/practices/screens_support.html

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