java - 如何有效管理Android应用程序的内存(堆)

Question

我是 android 新手，谁能告诉我如何编写有效的内存管理代码。

public class XXX extends Activity  {

EditText et;
ImageView iv;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    et = (EditText) findViewById(R.id.editText);
iv  = (ImageView) findViewById(R.id.iv);


}

     public void release(){
 et=null;

 Drawable drawable = ((ImageView) iv).getDrawable();
        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            bitmapDrawable.getBitmap().recycle();
        }

 iv=null;
System.gc();
}

 public void onPic(View v){
// code to capture image
 }

public void onSave(View v){
    DBHelper dbHelper = new DBHelper(this);
    SqliteDatabase db = dbHelper.getReadableDatabase();

String name =   et.getText().toString();

ContentValues cv cv= new ContentValues();
// saving , calling release();  and going back to main screen


}

我可以做些什么来避免内存不足、电话挂起吗？

Answer 1

Bitmap 不容易释放内存，因此大多会导致内存溢出异常。您可以调整位图大小并加载它。

这可能会帮助您显示有效的位图加载: Bitmap loading

您可以从这里查看完整的理解文档 Bitmap handling