java - 带有进度对话框android的泄漏窗口错误

Question

我在显示带有 AsyncTask 的 progress dialog 时遇到问题:

Activity has leaked window com.android.internal.policy.PhoneWindow$DecorView{8cee959 V.E...... R......D 0,0-1026,252} that was originally added here

这是我的异步任务:

public class MyClientTask extends AsyncTask<Void, Void, Void> {
    private ProgressDialog progressDialog = null;

    private Context mContext;

    MyClientTask(Context mContext) {
        this.mContext = mContext;

    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog = new ProgressDialog(mContext);
        progressDialog.setMessage("Working ...");
        progressDialog.setIndeterminate(false);
        progressDialog.setCancelable(false);
        progressDialog.show();
    }

    @Override
    protected Void doInBackground(Void... arg0) {
        try {
            wait(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);

        if (progressDialog != null) {
            progressDialog.dismiss();
            progressDialog = null;
        }

    }
}

这是我的 Activity :

public class ConnectionActivity extends Activity {

    final private Context mContext = this;
    private Button buttonConnect;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R .layout.activity_socketconnection);

        buttonConnect = (Button) findViewById(R.id.buttonConnect);

        buttonConnect.setOnClickListener(getConnectOncOnClickListener());
    }

    private OnClickListener getConnectOncOnClickListener() {
        return new OnClickListener() {

            @Override
            public void onClick(View v) {
                MyClientTask myClientTask = new MyClientTask(mContext);
                try {

                        myClientTask.execute();
                        myClientTask.get();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (ExecutionException e) {
                    e.printStackTrace();
                }

            }
        };
    }

}

我搜索了解决方案，但还是不行

Answer 1

一些提示:

1. 保留对 ProgressDialog 的引用在您的 Activity 中并添加公共(public)方法来显示/隐藏它；

2. 使用 WeakReference<Context>在你的AsyncTask让垃圾收集器完成它的工作；

3. 去掉 myClientTask.get()阻塞 UI 线程。