2.5.1 使用alertDialog

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:layout_gravity="center"    android:orientation="vertical" >    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:text="Button" />    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:text="TextView" /></LinearLayout>

package com.moon.hello2;import java.util.ArrayList;import java.util.Calendar;import java.util.HashMap;import java.util.List;import java.util.Map;import android.R.anim;import android.R.integer;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.res.TypedArray;import android.database.DataSetObserver;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Gravity;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.view.ViewGroup.LayoutParams;import android.view.animation.AnimationUtils;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.DatePicker;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.Gallery;import android.widget.GridView;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.RatingBar;import android.widget.SimpleAdapter;import android.widget.RatingBar.OnRatingBarChangeListener;import android.widget.SeekBar;import android.widget.DatePicker.OnDateChangedListener;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TabHost;import android.widget.TextView;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;import android.widget.ViewSwitcher.ViewFactory;public class MainActivity extends Activity {    private final int[] imgs = new int[] { R.drawable.a1, R.drawable.a2,            R.drawable.a3, R.drawable.a4, R.drawable.a5, R.drawable.a6,            R.drawable.a7, R.drawable.a8 };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.setContentView(R.layout.activity_main);        Button button = (Button)findViewById(R.id.button1);        final TextView textView = (TextView)findViewById(R.id.textView1);        button.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);                builder.setMessage("这是一个用于测试的dialog");                builder.setIcon(R.drawable.ic_launcher);                builder.setTitle("这是title");                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {                                        @Override                    public void onClick(DialogInterface arg0, int arg1) {                        // TODO Auto-generated method stub                        textView.setText("你按下了确认键");                    }                });                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {                                        @Override                    public void onClick(DialogInterface arg0, int arg1) {                        // TODO Auto-generated method stub                        textView.setText("你按下了取消键");                    }                });                builder.create().show();            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}

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