resultCode返回碼和onclick代碼重構的實現

這篇文章主要為大家詳細介紹了resultCode返回碼和onclick代碼重構的實現，文中示例代碼介紹的非常詳細，零基礎也能參考此文章，感興趣的小伙伴們可以參考一下。

主頁：

public class MainActivity extends Activity
{
    /**
     * 主頁點擊按鈕跳轉到第二頁
     * 第二頁點擊按鈕1將字符串內容顯示到主頁，點擊按鈕2將數字內容顯示到主頁
     */
    private final static int RESULT_CODE_ONE = 1;
    private final static int RESULT_CODE_TWO = 2;
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        TextView textView = (TextView) findViewById(R.id.textView1_main);
        String text = null;
        switch (resultCode)//判斷返回碼
        {
            case RESULT_CODE_ONE:
                text = "from按鈕1:" + data.getStringExtra("btnone");
                break;
            case RESULT_CODE_TWO:
                int age = data.getIntExtra("btntwo", 0);//0為默認值，當data沒有接收到返回的int時，返回這個默認值
                text ="from按鈕2:"+ String.valueOf(age);
                break;
            default:
                break;
        }
        textView.setText(text);
    }
                                                          
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
                                                              
        findViewById(R.id.button1_main).setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent intent = new Intent(MainActivity.this, SecondActivity.class);
                startActivityForResult(intent , 0);
            }
        });
    }
                                                          
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

第二頁

public class SecondActivity extends Activity
{
    private final static int RESULT_CODE_ONE = 1;
    private final static int RESULT_CODE_TWO = 2;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        final Intent data = new Intent();
        findViewById(R.id.button1).setOnClickListener(new OnClickListener()
        {
                                             
            @Override
            public void onClick(View v)
            {
                data.putExtra("btnone", "name");
                setResult(RESULT_CODE_ONE, data );//設置返回碼
                finish();
            }
        });
                                         
        findViewById(R.id.button2).setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                data.putExtra("btntwo", 12);
                setResult(RESULT_CODE_TWO, data );//設置返回碼
                finish();
            }
        });
                                         
    }
                                     
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.second, menu);
        return true;
    }
}

第二頁按鈕事件重構過程一：

1.實現OnClickListener接口

2.重寫onClick(View v)

3.findViewById(R.id.button1).setOnClickListener(this)

public class SecondActivity extends Activity implements OnClickListener//實現監聽者接口
{
    private final static int RESULT_CODE_ONE = 1;
    private final static int RESULT_CODE_TWO = 2;
             
    @Override
    public void onClick(View v)//重寫點擊方法
    {
        Intent data = new Intent();
        if(v.getId() == R.id.button1)//判斷view的id
        {
            data.putExtra("btnone", "name");
            setResult(RESULT_CODE_ONE, data );
            finish();
        }
        if(v.getId() == R.id.button2)
        {
            data.putExtra("btntwo", 12);
            setResult(RESULT_CODE_TWO, data );
            finish();
        }
    }
              
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
                  
        findViewById(R.id.button1).setOnClickListener(this);//監聽按鈕
        findViewById(R.id.button2).setOnClickListener(this);
    }
              
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.second, menu);
        return true;
    }
}

第二頁按鈕事件重構過程二：將事件內容以方法代替

public class SecondActivity extends Activity implements OnClickListener//實現監聽者接口
{
    private final static int RESULT_CODE_ONE = 1;
    private final static int RESULT_CODE_TWO = 2;
          
    @Override
    public void onClick(View v)//重寫點擊方法
    {
        Intent data = new Intent();
        if(v.getId() == R.id.button1)//判斷view的id
        {
//            data.putExtra("btnone", "name");
//            setResult(RESULT_CODE_ONE, data );
//            finish(); 
            sendResult("btnone", "name", RESULT_CODE_ONE);
        }
        if(v.getId() == R.id.button2)
        {
//            data.putExtra("btntwo", 12);
//            setResult(RESULT_CODE_TWO, data );
//            finish();
            sendResult("btntwo", Integer.valueOf(12), RESULT_CODE_TWO);
        }
    }
           
           
    private void sendResult(String extraKey, Object content, int resultCode)
    {
        Intent data = new Intent();
        if (content instanceof String)
        {
            data.putExtra(extraKey, (String) content);
        }
        else if (content instanceof Integer)
        {
            data.putExtra(extraKey, (Integer) content);
        }
        setResult(resultCode, data);
        finish();
    }
           
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
               
        findViewById(R.id.button1).setOnClickListener(this);//監聽按鈕
        findViewById(R.id.button2).setOnClickListener(this);
    }
           
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.second, menu);
        return true;
    }
}

以上就是resultCode返回碼和onclick代碼重構的代碼，如果在日常工作遇到這個問題，希望你能通過這篇文章解決問題。如果想了解更多相關內容，歡迎關注億速云行業資訊頻道！