Question

我正在看这个例子 https://developer.android.com/training/location/retrieve-current.html#CheckServices

以下是相关代码：

public class MainActivity extends FragmentActivity {
    ...
    private boolean servicesConnected() {
        ...
        if (ConnectionResult.SUCCESS == resultCode) {
            ...
            // Google Play services was not available for some reason.
            // resultCode holds the error code.
        } else {
            // Get the error dialog from Google Play services
            Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
                resultCode,
                this,
                CONNECTION_FAILURE_RESOLUTION_REQUEST);
            ...
        }
    }
}

如果我们查看GooglePlayServicesUtil.getErrorDialog(..)，我们会将this的引用传递给Activity。

问题是： 在配置更改期间是否会导致内存泄漏？

我想答案取决于GooglePlayServicesUtil.getErrorDialog(..)如何/内部保留对Activity的引用。

Answer 1

是的，我的应用程序曾经泄漏

如果您有谷歌播放服务错误对话框，然后再次旋转它将泄漏

这是我为解决泄漏而采取的解决方案，但这假设您的Google Play服务检查位于onResume

public class MainActivity extends Activity
{
private Dialog googlePlayErrorDialog;

@Override
    protected void onResume()
    {
        // TODO Auto-generated method stub
        super.onResume();
        int isAvaiable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
        if(isAvaiable == ConnectionResult.SUCCESS)
        {
            Log.d("TEST", "GPS IS OK");
        }
        else if(isAvaiable == ConnectionResult.SERVICE_MISSING || 
                isAvaiable == ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED || 
                isAvaiable == ConnectionResult.SERVICE_DISABLED)
        {
            googlePlayErrorDialog = GooglePlayServicesUtil.getErrorDialog(isAvaiable, this, 10);
            googlePlayErrorDialog.show();

        }

    }

    @Override
    protected void onPause()
    {
        // TODO Auto-generated method stub
        super.onPause();
        if(googlePlayErrorDialog != null)
        {
            googlePlayErrorDialog.dismiss();
        }

    }

所以这里的交易是我将getErrorDialog设置为一个我自己的对话框变量，然后在onPause中做一个简单的空检查（以避免可怕的空指针异常！）并调用dismiss。

如果您想了解更多信息，我从阅读本书中得到了这个想法

http://publicstaticdroidmain.com/2012/01/avoiding-android-memory-leaks-part-1/

Google Play服务错误对话框潜在的内存泄漏？

1 个答案: