DialogActivity.java

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The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...

/*
 * Copyright (C) 2008 The Android开源工程
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.app;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;

/**
 * <h3>Dialog Activity</h3>
 *
 * <p>This demonstrates the how to write an activity that looks like
 * a pop-up dialog.</p>
 */
public class DialogActivity extends Activity {
    /**
     * Initialization of the Activity after it is first created.  Must at least
     * call {@link android.app.Activity#setContentView setContentView()} to
     * describe what is to be displayed in the screen.
     */
    @Override
	protected void onCreate(Bundle savedInstanceState) {
        // Be sure to call the super class.
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_LEFT_ICON);


        // See assets/res/any/layout/dialog_activity.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.dialog_activity);
        getWindow().setTitle("This is just a test");

        getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
                android.R.drawable.ic_dialog_alert);

        Button button = (Button)findViewById(R.id.add);
        button.setOnClickListener(mAddContentListener);
        button = (Button)findViewById(R.id.remove);
        button.setOnClickListener(mRemoveContentListener);
    }

    private OnClickListener mAddContentListener = new OnClickListener() {
        public void onClick(View v) {
            LinearLayout layout = (LinearLayout)findViewById(R.id.inner_content);
            ImageView iv = new ImageView(DialogActivity.this);
            iv.setImageDrawable(getResources().getDrawable(R.drawable.icon48x48_1));
            iv.setPadding(4, 4, 4, 4);
            layout.addView(iv);
        }
    };

    private OnClickListener mRemoveContentListener = new OnClickListener() {
        public void onClick(View v) {
            LinearLayout layout = (LinearLayout)findViewById(R.id.inner_content);
            int num = layout.getChildCount();
            if (num > 0) {
                layout.removeViewAt(num-1);
            }
        }
    };
}