Question

我有Activity_A和Activity_B。我使用onActivityResult，我有一个问题：

java.lang.RuntimeException：传递结果失败 ResultInfo {who = null，request = 3，result = -1，data = Intent {（has extras） }} to activity {com.example.sellcar / com.example.sellcar.View_Offer}： android.database.CursorIndexOutOfBoundsException：请求索引0，大小为0

我想我无法通过这种方式将'result'从alertDialog传递给onActivityResult。我不知道如何解决这个问题：/ 请帮忙

Activity_A：

bBUTTON.setOnClickListener(new OnClickListener() {          
            @Override
            public void onClick(View v) {           
            Intent intent = new Intent(Activity_A.this,Activity_B.class);
            startActivityForResult(intent, 3);

            }
        });
...
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if(requestCode == 3 && resultCode == RESULT_OK){

                String pId = data.getStringExtra("MyData");

Toast.makeText(Activity_A.this,pId,Toast.LENGTH_LONG).show(); 
                }
    }

Activity_B：

    AlertDialog.Builder builder=new AlertDialog.Builder(View_Sell.this);
    builder.setTitle("UWAGA !").setMessage("blablabla");

    builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {       
       @Override
       public void onClick(DialogInterface dialog, int id) {                                                                                            
       String ostatnioDodanaSprzedaz="XYZ";
       Intent intent = new Intent();
       intent.putExtra("MyData", ostatnioDodanaSprzedaz);
       setResult(RESULT_OK, intent);
       onBackPressed();                                         
 } });

    builder.setNegativeButton("NO",  new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {                               
 } });  

AlertDialog ad = builder.create();
ad.show();

Answer 1

尝试替换：

setResult(RESULT_OK, intent);
onBackPressed();

在：

if (getParent() == null) {
    setResult(RESULT_OK, intent);
} else {
    getParent().setResult(RESULT_OK, intent);
}
finish();

Answer 2

您可以按照观察者模式进行操作。

首先，在Activity类本身中创建一个接口：

public interface ResultListener {
        void onResultSet(String text);
    }

然后，全局创建一个ResultListener对象：

ResultListener = rl;

在onCreate方法中实现onResultSet(String text)方法：

rl = new ResultListener() {

            @Override
            public void onPositiveResult(String text) {
                Toast.makeText(context, text, Toast.LENGTH_LONG).show();
            }
        };

接下来，创建AlertDialog

AlertDialog.Builder builder=new AlertDialog.Builder(this);
    builder.setTitle("UWAGA !").setMessage("blablabla");

    builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {       
       @Override
       public void onClick(DialogInterface dialog, int id) {                                                                                            
       String ostatnioDodanaSprzedaz="XYZ";
       tl.onResultSet(ostatnioDodanaSprzedaz);
      // onBackPressed();                                         
 } });

    builder.setNegativeButton("NO",  new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {                               
 } });  
    builder.show();

以下是最终代码的外观：

        public class MainActivity extends Activity {

            ResultListener rl;

            @Override
            public void onCreate(Bundle savedInstanceState) {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.main_layout);

                rl = new ResultListener() {
                @Override
                public void onPositiveResult(String text) {
                    Toast.makeText(context, text, Toast.LENGTH_LONG).show();
                }
            };

            AlertDialog.Builder builder=new AlertDialog.Builder(this);
            builder.setTitle("UWAGA !").setMessage("blablabla");
            builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {       
                       @Override
                       public void onClick(DialogInterface dialog, int id) {                                                                                            
                       String ostatnioDodanaSprzedaz="XYZ";
                       rl.onResultSet(ostatnioDodanaSprzedaz);
                      // onBackPressed();                                         
                 } });

             builder.setNegativeButton("NO",  new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int id) {                               
                 } });  

             builder.show();

        } //onCreate closed

        public interface ResultListener {
                void onResultSet(String text);
        }

} //MainActivity Class closed

如何将alertDialog的结果传递给onActivityResult

2 个答案: