Android强制方向只有一个方向

<activity android:name=".MainActivity"
          android:screenOrientation="portrait">
    <!-- 其他配置 -->
</activity>

<activity android:name=".MainActivity"
          android:screenOrientation="landscape">
    <!-- 其他配置 -->
</activity>

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

        // 强制纵向模式
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        // 或者强制横向模式
        // setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }
}

public void toggleOrientation(View view) {
    if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    } else {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRATIVE);
    }
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        // 处理横向模式
    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
        // 处理纵向模式
    }
}