在文本視圖中顯示Toast消息

Question

我正在使用SQLite數據庫來存儲和檢索數據到我的android應用程序。在下面的代碼中，我使用Toast消息將我的表格數據添加到我的屏幕上。我想在textview中將所有記錄顯示到我的屏幕上。我很無奈在哪裏做改變。如果有人可以用這段代碼來幫助我，那真的很有幫助。嘗試了多個選項並失敗。

這是我的主要活動。

public class MainActivity extends Activity { 
protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     DatabaseHandler db = new DatabaseHandler(this); 

      try { 
     String destPath = "/data/data/" + getPackageName() 
       + "/databases/questions"; 
     File f = new File(destPath); 
     if (!f.exists()) { 
      CopyDB(getBaseContext().getAssets().open("questions"), 
        new FileOutputStream(destPath)); 
     } 
    } 

      catch (FileNotFoundException e) { 
     e.printStackTrace(); 
     Toast.makeText(MainActivity.this, "Error File", Toast.LENGTH_SHORT) 
       .show(); 
    } 
      catch (IOException e1) { 
     e1.printStackTrace(); 
     Toast.makeText(MainActivity.this, "Error IO", Toast.LENGTH_SHORT) 
       .show(); 
    } 

Cursor cursor = db.getAllQuestions(); 
     if (cursor.moveToFirst()) 
     { 
      do { 
       DisplayRecord(cursor); 

      } 
      while(cursor.moveToNext()); 
     } 

     db.close(); 
    } 

     public void CopyDB(InputStream inputstream, OutputStream outputstream)   
       throws IOException { 
      byte[] buffer = new byte[1024]; 
      int length; 
      while ((length = inputstream.read(buffer))>0){ 
       outputstream.write(buffer, 0, length); 
      } 
      inputstream.close(); 
      outputstream.close(); 
     } 

     public void DisplayRecord(Cursor cursor){ 
      Toast.makeText(this, 
        "id:" + cursor.getString(0) + "\n" + 
        "Question:" + cursor.getString(1) + "\n" + 
        "Answer:" + cursor.getString(2), 
        Toast.LENGTH_SHORT).show(); 


     } 
} 

在此先感謝

Answer 1

在activity_main.xml在DisplayRecord變化Toast到TextView

IN activity_main.xml

<TextView 
      android:id="@+id/textid" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"/> 

創建TextView名字像文本ID，然後在MainActivity

public void DisplayRecord(Cursor cursor){ 

    TextView text=(TextView)findViewById(R.id.textid); 
    text.setText(
     "id:" + cursor.getString(0) + "\n" + 
     "Question:" + cursor.getString(1) + "\n" + 
     "Answer:" + cursor.getString(2) 
     ); 
}