android - 两个按钮打开两个新 Activity

Question

我正在学习 Android，我在主要 Activity 中创建了两个按钮，然后我想从每个按钮打开新 Activity ，按钮 2 工作但按钮 1 不工作，我的代码:

public class MainActivity extends Activity {
    Button btn;
    Button btn2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button) findViewById(R.id.button2);
        btn2 = (Button) findViewById(R.id.button1);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent intent = new Intent(MainActivity.this, Allactivities.class);
                startActivity(intent);
                Intent i = new Intent(MainActivity.this, Review.class);
                startActivity(i);
            }
        });
    }
}

XML代码:

<Button
    android:id="@+id/button2"
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:layout_above="@+id/button1"
    android:layout_marginBottom="26dp"
    android:background="@drawable/btnbluee"
    android:text="@string/button_tittle"
    android:onClick="onClick" />

<Button
    android:id="@+id/button1"
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="192dp"
    android:background="@drawable/btnorange"
    android:text="@string/button_title"
    android:onClick="onClick" />

Answer 1

button 2 is working but button one is not work,

这是因为您需要为每个按钮添加一个监听器:

 btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(MainActivity.this,Allactivities.class);
            startActivity(intent);
            Intent i = new Intent(MainActivity.this,Review.class);
            startActivity(i);

        }
    });

和

btn2.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(MainActivity.this,Allactivities.class);
            startActivity(intent);
            Intent i = new Intent(MainActivity.this,Review.class);
            startActivity(i);

        }
    });

只是一个建议..

尝试在布局和代码之间保持一致，您将免除颈部疼痛...

 btn = (Button)findViewById(R.id.button2);
 btn2= (Button)findViewById(R.id.button1);

必须是:

 btn = (Button)findViewById(R.id.button1);
 btn2= (Button)findViewById(R.id.button2);