菜單上單擊項事件

Question

我加3菜單項：設置/關於和退出。 正如你在代碼中所看到的，我做了退出按鈕來關閉這個應用程序，並且我想當我按下關於按鈕來打開一個新的活動。我怎麼做？

import android.support.v7.app.ActionBarActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Toast; 


public class MainActivity extends ActionBarActivity { 

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

    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 

    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 

     } else if (id == R.id.Exit){ 

      finish(); 
      return true; 

     } 
     return super.onOptionsItemSelected(item); 
    } 

} 

Answer 1

if(id == R.id.action_masterz_yuris_about){ 
    Intent openAboutActivityIntent = new Intent(this, MasterZYurisAboutActivity.class); 
    startActivity(openAboutActivityIntent); 
} 

Answer 2

試試這個代碼

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 
    if (id == R.id.action_settings) { 
     return true; 

    } else if (id == R.id.Exit){ 

     finish(); 
     return true; 

    }else if (id == R.id.about){ 

     Intent intent = new Intent(this, SecondActivity.class); 
     startActivity(intent); 
     return true; 

    } 
    return super.onOptionsItemSelected(item); 
}