<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#fff">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#86222222"
android:orientation="horizontal" >
<TextView
android:id="@+id/titleTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="遮罩效果"
android:textColor="#ff0000" />
<Button
android:id="@+id/unfoldButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="显示遮罩" />
</RelativeLayout>
</FrameLayout>
public class ShadeActivity extends Activity {
// 设置是否展开
private boolean isFolded = true;
// 设置控件
private FrameLayout layout = null;
private Button unfoldButton = null;
private TextView textView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_shade);
initView();
}
@Override
protected void onResume() {
// TODO Auto-generated method stu
super.onResume();
isFolded = true;
}
// 初始化
private void initView() {
layout = (FrameLayout) findViewById(R.id.layout);
unfoldButton = (Button) findViewById(R.id.unfoldButton);
unfoldButton.setOnClickListener(new UnfoldClickListener());
}
// 按钮监听,展开一个透明的显示文本的遮挡层
private class UnfoldClickListener implements OnClickListener {
public void onClick(View v) {
if (isFolded) {
textView = new TextView(ShadeActivity.this);
textView.setTextColor(Color.BLUE);
textView.setTextSize(20);
textView.setText("滚滚长江东逝水,浪花淘尽英雄。\n" + "是非成败转头空,\n"
+ "青山依旧在,几度夕阳红。\n" + "白发渔樵江渚上,惯看秋月春风。 \n"
+ "一壶浊酒喜相逢,\n" + "古今多少事,都付笑谈中。");
textView.setGravity(Gravity.CENTER);
textView.setLayoutParams(new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.FILL_PARENT));
textView.setBackgroundColor(Color.parseColor("#86222222"));
unfoldButton.setText("取消遮罩");
isFolded = false;
layout.addView(textView);
} else {
unfoldButton.setText("显示遮罩");
isFolded = true;
layout.removeView(textView);
}
}
}
}
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