Question

我正在尝试在选择菜单项时启动新的Activity。我已经成功完成了一个菜单项（下载），但现在我正在尝试进行搜索。但是，活动甚至都没有开始。

希望有人可以指出我所缺少的东西。

谢谢！

以下是相关代码：

1）在家长活动中。当我删除意图时，吐司会显示。当我把它重新插入时，应用程序崩溃而没有显示吐司。

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId())   {

    case R.id.action_download:
        image.setDrawingCacheEnabled(true);

        Bitmap bmp = image.getDrawingCache();
        String name = random();

        if (MediaStore.Images.Media.insertImage(getContentResolver(), bmp, name , "description") != null)   {
            Context context = getApplicationContext();
            CharSequence text = "Downloaded image successfully!";
            int duration = Toast.LENGTH_SHORT;

            Toast toast = Toast.makeText(context, text, duration);
            toast.show();
        }
        else    {
            Context context = getApplicationContext();
            CharSequence text = "Not successful!";
            int duration = Toast.LENGTH_SHORT;

            Toast toast = Toast.makeText(context, text, duration);
            toast.show();
        }

 case R.id.action_search:
        Context context = getApplicationContext();
        CharSequence text = "Made it to this point!";
        int duration = Toast.LENGTH_SHORT;
        Toast toast = Toast.makeText(context, text, duration);
        toast.show();

        Intent j = new Intent(this, GoogleSearchIntent.class);
        startActivity(j);

        return true;
    default:
        return super.onOptionsItemSelected(item);
    }

}

2）在Manifest中：

<activity
        android:name="com.example.myfirstapp.GoogleSearchIntent"
        android:label="@string/search_text" >

</activity>

编辑：我已按建议添加了break语句，但仍然没有运气。

另一个编辑：我改变了意图以切换到我的其他活动之一。这工作很精细，那么我的活动GoogleSearchIntent会导致问题吗？

public class GoogleSearchIntent extends Activity {

private EditText editTextInput;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.remain);

   // editTextInput = (EditText) findViewById(R.id.editTextInput);
   }

public void onSearchClick(View v)
{
    try {
         Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
         String term = editTextInput.getText().toString();
         intent.putExtra(SearchManager.QUERY, term);
         startActivity(intent);
    } catch (Exception e) {
        // TODO: handle exception
    }

}
}

感谢您的帮助!!

Answer 1

你忘了＆＃34;打破＆＃34;

 case R.id.action_download:
    image.setDrawingCacheEnabled(true);

    Bitmap bmp = image.getDrawingCache();
    String name = random();

    if (MediaStore.Images.Media.insertImage(getContentResolver(), bmp, name , "description") != null)   {
        Context context = getApplicationContext();
        CharSequence text = "Downloaded image successfully!";
        int duration = Toast.LENGTH_SHORT;

        Toast toast = Toast.makeText(this, text, duration);
        toast.show();
    }
    else    {
        Context context = getApplicationContext();
        CharSequence text = "Not successful!";
        int duration = Toast.LENGTH_SHORT;

        Toast toast = Toast.makeText(this, text, duration);
        toast.show();
    }
    break;
    case R.id.action_search:
    Context context = getApplicationContext();
    CharSequence text = "Made it to this point!";
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(this, text, duration);
    toast.show();

    Intent j = new Intent(this, GoogleSearchIntent.class);
    startActivity(j);
    break;

default:
    return super.onOptionsItemSelected(item);
}

你应该用这种方式初始化祝酒词：

Toast toast = Toast.makeText(this, text, duration);

或者只需一步调用它们：

Toast.makeText(this, R.string.prompt_to_check_gps, Toast.LENGTH_LONG).show();

无法启动新活动，烤面包将无法显示

1 个答案: