android内存溢出！！求具体的解决办法

[iceyear1]

package micr3.login;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.net.Uri;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

public class Logining1Activity extends Activity {
/** Called when the activity is first created. */
EditText username;
EditText password;
CheckBox p1,p2,p3,p4;
Button logining;
String name;
String pasd;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
username=(EditText)findViewById(R.id.autocomplete);
password=(EditText)findViewById(R.id.password);
p1=(CheckBox)findViewById(R.id.plain_cb1);
p2=(CheckBox)findViewById(R.id.plain_cb2);
p3=(CheckBox)findViewById(R.id.plain_cb3);
p4=(CheckBox)findViewById(R.id.plain_cb4);
logining=(Button)findViewById(R.id.logining);

p1.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
name = username.getText().toString();
pasd = password.getText().toString();
SharedPreferences sp = getSharedPreferences("preferences",

Context.MODE_PRIVATE);
Editor editor = sp.edit();

editor.putString("name", name);

editor.putString("password", pasd);
if (editor.commit())

Toast.makeText(Logining1Activity.this,

R.string.save_success, 1).show();

else
Toast.makeText(Logining1Activity.this,
R.string.save_failed, 1).show();
}
});
logining.setOnClickListener(new OnClickListener() {

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



String name1 = username.getText().toString();
String pasd1 = password.getText().toString();
if(name1=="qq"||pasd1=="qq"){
Intent intent=new Intent();
intent.setClass(Logining1Activity.this, Mainface.class);
startActivity(intent);
Logining1Activity.this.finish();

}
else{
Toast.makeText(Logining1Activity.this,
R.string.wrong, 1).show();

}



}
});




}

}在如上的Activity中我该怎样使用Bitmap方法，或者还有更好的办法 求各位帮忙，同时标明注释 谢谢！！！！

[安卓机器人]

Bitmap的使用是尽量使用小图，尽量做到不使用的时候就回收
这里有篇文章介绍关于避免OOM错误
http://ttlnews.blogspot.com/2010/01/attacking-memory-problems-on-android.html

[念茜]

● 主要是加上这段：

BitmapFactory.Options options = new BitmapFactory.Options(); 
                options.inSampleSize = 2; 

● eg1：(通过Uri取图片)

private ImageView preview; 
BitmapFactory.Options options = new BitmapFactory.Options(); 
                    options.inSampleSize = 2;//图片宽高都为原来的二分之一，即图片为原来的四分之一 
                    Bitmap bitmap = BitmapFactory.decodeStream(cr 
                            .openInputStream(uri), null, options); 
                    preview.setImageBitmap(bitmap); 

以上代码可以优化内存溢出，但它只是改变图片大小，并不能彻底解决内存溢出。
● eg2:（通过路径去图片）

private ImageView preview; 
private String fileName= "/sdcard/DCIM/Camera/2010-05-14 16.01.44.jpg"; 
BitmapFactory.Options options = new BitmapFactory.Options(); 
                options.inSampleSize = 2;//图片宽高都为原来的二分之一，即图片为原来的四分之一 
                        Bitmap b = BitmapFactory.decodeFile(fileName, options); 
                        preview.setImageBitmap(b); 
                        filePath.setText(fileName); 

http://ming-fanglin.iteye.com/blog/1132564

[丿渎灬魂]

遇到同样问题、

[iceyear1]

package micr3.login;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
import dalvik.system.VMRuntime;

public class Logining1Activity extends Activity {
/** Called when the activity is first created. */
EditText username;
EditText password;
CheckBox p1,p2,p3,p4;
Button logining;
String name;
String pasd;

private final static float TARGET_HEAP_UTILIZATION = 0.75f;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
VMRuntime.getRuntime().setTargetHeapUtilization(TARGET_HEAP_UTILIZATION);
username=(EditText)findViewById(R.id.autocomplete);
password=(EditText)findViewById(R.id.password);
p1=(CheckBox)findViewById(R.id.plain_cb1);
p2=(CheckBox)findViewById(R.id.plain_cb2);
p3=(CheckBox)findViewById(R.id.plain_cb3);
p4=(CheckBox)findViewById(R.id.plain_cb4);
logining=(Button)findViewById(R.id.logining);

p1.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
name = username.getText().toString();
pasd = password.getText().toString();
SharedPreferences sp = getSharedPreferences("preferences",

Context.MODE_PRIVATE);
Editor editor = sp.edit();

editor.putString("name", name);

editor.putString("password", pasd);
if (editor.commit())

Toast.makeText(Logining1Activity.this,

R.string.save_success, 1).show();

else
Toast.makeText(Logining1Activity.this,
R.string.save_failed, 1).show();
}
});
logining.setOnClickListener(new OnClickListener() {

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



String name1 = username.getText().toString();
String pasd1 = password.getText().toString();
if(name1=="qq"||pasd1=="qq"){
Intent intent=new Intent();
intent.setClass(Logining1Activity.this, Mainface.class);
startActivity(intent);
Logining1Activity.this.finish();

}
else{
Toast.makeText(Logining1Activity.this,
R.string.wrong, 1).show();

}



}
});













}

}对不？？

[hnwhh]

VMRuntime.getRuntime().setTargetHeapUtilization(TARGET_HEAP_UTILIZATION);
能解决问题吗，
求结果

[Byron_]

在你认为图片资源已经作废后的情况下，请调用强制资源回收。

system.gc()

当然，这意味着你要很清楚你的资利用情况。在这在我的开发项目中有效的解决了问题。

[hnwhh]

system.gc()是收回全部的，还是什么

[wensefu]

1，设置图片解码方式
2，手动回收
3，改系统堆大小
无非是这三种方法