Question

我在将主页链接到其他页面时遇到问题。我已经搜索并运行了这里已经问过的所有q＆amp; a，但是有错误。有人可以帮助我..这是非常有用的.. tq

public class BackgroundTask extends AsyncTask<String,Void,String>
{
AlertDialog alertDialog;
ProgressDialog progressDialog;
Context ctx;
BackgroundTask(Context ctx)
{
    this.ctx=ctx;
}

@Override
protected void onPreExecute()
{
    alertDialog= new AlertDialog.Builder(ctx).create();
    alertDialog.setTitle("Login Information...");
}

@Override
protected String doInBackground(String... params)
{
    String login_url="http://10.0.2.2/webapp/login.php";
    String method = params[0];
}

@Override
protected void onProgressUpdate (Void... values)
{
    super.onProgressUpdate(values);
}

这是......

@Override
protected void onPostExecute (String result)
{

    alertDialog.setMessage(result);
    alertDialog.show();

     //Want to go new activity page`enter code here`

}
}

已经尝试过但无法正常工作。

Intent intent = new Intent(MyAsyncTaskActivity.this, NextActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
getApplicationContext().startActivity(intent);

Answer 1

    Intent intent = new Intent(ctx, NextActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //optional
    ctx.startActivity(intent);

Answer 2

你应该遵循这个结构

public class MyAsyncTaskActivity extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_screen);
            ....
            new BackgroundTask().execute();
            ....
        }

        private class BackgroundTask extends AsyncTask {

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
            }

            @Override
            protected Void doInBackground(Void... arg0) {

                // ….

                return null;
            }

            @Override
            protected void onPostExecute(Void result) {
                super.onPostExecute(result);
                Intent intent = new Intent(MyAsyncTaskActivity.this,NextActivity.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //optional
                startActivity(intent);
                finish();
            }

        }
    }

希望这个帮助

使用AsyncTask onPostExecute链接到新活动？

2 个答案: