更改LinearLayout中的视图背景

时间:2013-03-20 12:32:44

标签: android view background android-linearlayout ontouchlistener

我有LinearLayout,我在其中动态添加视图。我点击它时需要更改每个视图的背景。

我尝试在我的代码中执行此操作:

public class UserDetailActivity extends Activity implements View.OnTouchListener {
...
@Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.l_user_detail);

    Intent intent = getIntent();
    User user = (User) intent.getSerializableExtra("class");

    userWillGo = (LinearLayout) findViewById(R.id.linerLayout_userDetail_willGoTO);

    for (int i = 0; i < user.getUserWillGo().size(); i++) {
    View myView = (View)LayoutInflater.from(getApplicationContext()).inflate(R.layout.item_event_list, userWillGo, false);
                myView.setLayoutParams(new LinearLayout.LayoutParams(
                        LinearLayout.LayoutParams.FILL_PARENT,
                        LinearLayout.LayoutParams.FILL_PARENT));
                ...
                myView.setOnTouchListener(mOnTouchListener());
                userWillGo.addView(myView);
            }

}

private View.OnTouchListener mOnTouchListener() {
        return new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    v.setBackgroundResource(R.color.textBlue);
                }
                if (event.getAction() == MotionEvent.ACTION_UP) {
                    v.setBackgroundResource(R.drawable.bg_item);
                }
                return true;
            }
        };
}

此代码的结果是:

enter image description here

我需要得到的东西:

enter image description here

1 个答案:

答案 0 :(得分:3)

首先,我建议您使用列表视图组件,而不是循环添加布局。

在列表视图中,您可以创建项目选择器,但无论如何,在当前场景中,您可以在 myView布局上使用可绘制选择器 * selector_bg.xml * 作为   。您也可以使用 android:state_focused =“true | false”,如您的方案中所述:

<?xml version="1.0" encoding="utf-8"?>
        <selector xmlns:android="http://schemas.android.com/apk/res/android">
            <item android:state_pressed="true" android:drawable="@drawable/hover_bg" /> <!-- pressed -->
            <item android:drawable="@drawable/normal" /> <!-- default -->
        </selector>

<强> myView.setBackgroundResource(R.drawable.selector_bg)

Detailed Reference for the above click here