在活動之間傳遞數據問題

Question

在我的項目中，我使用排球庫來獲取數據，並基於這些數據我將添加按鈕，按鈕顯示正確，但問題是打開另一個活動不起作用：

RequestQueue requestQueue; 
TextView txt; 
final int MY_REQ_CODE = 12345; 

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

    final GridLayout layout = (GridLayout) findViewById(R.id.layout); 
    requestQueue = Volley.newRequestQueue(this.getApplicationContext()); 

    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, "url", null, 
      new Response.Listener<JSONObject>() { 
       @Override 
       public void onResponse(JSONObject response) { 
        try { 

         JSONObject jsonanswer = response.getJSONObject("answer"); 
         final String[] name=new String[9]; 

         txt = (TextView) findViewById(R.id.name); 

         JSONArray result = jsonanswer.getJSONArray("result"); 

         for (int i=0;i<jsonArrayresult.length();i++){ 
          JSONObject objresp = result.getJSONObject(i); 

          String name= objresp.getString("name"); 

          name[i] = name; 
         } 

         for (int i=0;i<titles.length;i++){ 
          Button btn = new Button(getApplicationContext()); 

          btn.setText(titles[i]); 

          layout.addView(btn); 

          btn.setOnClickListener(getProducts); 
          btn.setTag(titles[i]); 
         } 


        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 

       } 
      }, 
      new Response.ErrorListener() { 
       @Override 
       public void onErrorResponse(VolleyError error) { 
        Log.e("VOLLEY", "ERROR"); 
       } 
      } 
    ); 

    requestQueue.add(jsonObjectRequest); 
} 

View.OnClickListener getProducts = new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     Object tag = v.getTag(); 

     Intent intent = new Intent(getApplicationContext(), otherActivity.class); 

     intent.putExtra("name", tag.toString()); 
     startActivity(intent); 
    } 
}; 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    if(requestCode == MY_REQ_CODE) { 
     if (resultCode == RESULT_OK) { 
      //?? 

     } else if (resultCode == RESULT_CANCELED){ 
      Toast.makeText(getApplicationContext(), "Result canceled", Toast.LENGTH_SHORT).show(); 
     } 
    } 
} 

我的第二個活動是：

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_products_list); 

    setResult(RESULT_OK); 
    finish(); 

    final Intent intent = getIntent(); 

    final TextView txt = (TextView) findViewById(R.id.txt); 

    Bundle title = intent.getExtras(); 
    if (title != null) { 
     str = title.getString("title"); 
    } 

    txt.setText(str); 

} 

Answer 1

當你的內部活動之間移動，你應該使用startActivity(intent)方法，而不是startActivityForResult。

變化：

startActivityForResult(intent, MY_REQ_CODE); 

要：

startActivity(intent); 

UPDATE： 從我所看到的你還可以創建一個新的按鈕命名爲BTN但你assing監聽到其他按鈕。我沒有看到你創建btncategorie按鈕，它應該是：

Button btn = new Button(getApplicationContext()); 
btn.setText(titles[i]); 
btn.setOnClickListener(getProducts); 
btn.setTag(titles[i]); 
layout.addView(btn);