Android 关于Dialog弹出框

直接上效果图:

实现步骤:

1.主界面activity_main.xml很简单,一个按钮

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/skin_background"
 >

    <Button
        android:id="@+id/show"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:gravity="center"
        android:text="退出系统"
        android:textSize="20sp" />

</RelativeLayout>

2.弹出层样式actionsheet.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/transparent"
    android:orientation="vertical"
    android:padding="5dp" >

    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/actionsheet_top_normal"
        android:gravity="center"
        android:text="@string/title"
        android:textColor="#8F8F8F"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/actionsheet_bottom_selector"
        android:gravity="center"
        android:text="@string/content"
        android:textColor="#FD4A2E"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/cancel"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:background="@drawable/actionsheet_single_selector"
        android:gravity="center"
        android:text="@string/cancel"
        android:textColor="#037BFF"
        android:textSize="16sp" />

</LinearLayout>

3.ActionSheet类

public class ActionSheet {

	public interface OnActionSheetSelected {
		void onClick(int whichButton);
	}

	private ActionSheet() {
	}

	public static Dialog showSheet(Context context, final OnActionSheetSelected actionSheetSelected,
			OnCancelListener cancelListener) {
		final Dialog dlg = new Dialog(context, R.style.ActionSheet);
		LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.actionsheet, null);
		final int cFullFillWidth = 10000;
		layout.setMinimumWidth(cFullFillWidth);

		TextView mContent = (TextView) layout.findViewById(R.id.content);
		TextView mCancel = (TextView) layout.findViewById(R.id.cancel);

		mContent.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				actionSheetSelected.onClick(0);
				dlg.dismiss();
			}
		});

		mCancel.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				actionSheetSelected.onClick(1);
				dlg.dismiss();
			}
		});

		Window w = dlg.getWindow();
		WindowManager.LayoutParams lp = w.getAttributes();
		lp.x = 0;
		final int cMakeBottom = 0;
		lp.y = cMakeBottom;
		lp.gravity = Gravity.CENTER;
		dlg.onWindowAttributesChanged(lp);
		dlg.setCanceledOnTouchOutside(false);
		if (cancelListener != null)
			dlg.setOnCancelListener(cancelListener);

		dlg.setContentView(layout);
		dlg.show();

		return dlg;
	}

}

4.MainActivity

public class MainActivity extends Activity implements OnActionSheetSelected, OnCancelListener {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		findViewById(R.id.show).setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				ActionSheet.showSheet(MainActivity.this, MainActivity.this, MainActivity.this);
			}
		});
	}

	@Override
	public void onClick(int whichButton) {
		// TODO Auto-generated method stub
		switch (whichButton) {
			case 0:
				showToast("确定");
				break;

			case 1:
				showToast("取消");
				break;

			default:
				break;
		}

	}

	@Override
	public void onCancel(DialogInterface dialog) {
		// TODO Auto-generated method stub
		showToast("取消");
	}

	private void showToast(CharSequence charSequence) {
		Toast.makeText(this, charSequence, Toast.LENGTH_SHORT).show();
	}
}

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