安卓开发04：对话框例子
layout中设置两个可点击按钮：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_dialog"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/dialog"
android:onClick="onClickDialog" />
<Button
android:id="@+id/btn_dialogs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/progressDialog"
android:onClick="onClickProgressDialog" />
</LinearLayout>
Activity代码：
package com.example.androidtest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private String tag = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main); //设置一个View模板
Log.d(tag, "In the onCreate() event");
}
@Override
public void onStart() {
super.onStart();
Log.d(tag, "In the onStart() event");
Toast.makeText(getBaseContext(), "onStart", Toast.LENGTH_SHORT).show();
}
public void onRestart() {
super.onRestart();
Log.d(tag, "In the onRestart() event");
}
public void onResume() {
super.onResume();
Log.d(tag, "In the onResume() event");
}
public void onPause() {
super.onPause();
Log.d(tag, "In the onPause() event");
}
public void onStop() {
super.onStop();
Log.d(tag, "In the onStop() event");
}
public void onDestroy() {
super.onDestroy();
Log.d(tag, "In the onDestroy() event");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/**
* 点击打开对话框
* @param v
*/
@SuppressWarnings("deprecation")
public void onClickDialog(View v) {
Log.d(tag, "onClickDialog");
showDialog(0);
}
/**
* 点击打开进度条
* @param v
*/
public void onClickProgressDialog(View v) {
Log.d(tag, "onClickProgressDialog");
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setTitle("ProgressDialog"); //设置标题
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); //设置样式
progressDialog.setMessage("please wait...");
progressDialog.setProgress(0); //设置进度开始点
progressDialog.setMax(100); //进度最大是100
progressDialog.show();
new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(1000);
progressDialog.setProgress(10); //每隔1秒就可以设置10
Thread.sleep(1000);
progressDialog.setProgress(20);
Thread.sleep(1000);
progressDialog.setProgress(30);
Thread.sleep(1000);
progressDialog.setProgress(40);
Thread.sleep(1000);
progressDialog.setProgress(50);
Thread.sleep(1000);
progressDialog.setProgress(60);
Thread.sleep(1000);
progressDialog.setProgress(70);
Thread.sleep(1000);
progressDialog.setProgress(90);
Thread.sleep(1000);
progressDialog.setProgress(100);
Thread.sleep(1000);
progressDialog.dismiss();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0:
Builder builder = new AlertDialog.Builder(this); //创建一个对话框
builder.setTitle("Android 对话框"); //设置标题
builder.setMessage("message"); //设置message
builder.setIcon(android.R.drawable.ic_dialog_info); //设置图标
builder.setView(new EditText(this)); //设置一个填写的框
builder.setMultiChoiceItems(new String[] {"选项1","选项2","选项3","选项4"}, null, null); //选择框
builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "YES!", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "NO!", Toast.LENGTH_SHORT).show();
}
});
return builder.create();
}
return null;
}
}
普通对话框：
我们可以看到layout布局视图中有两个按钮，第一个按钮点击后打开的是普通对话框，点击事件android:onClick后调用Activity中的onClickDialog方法
<Button
android:id="@+id/btn_dialog"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/dialog"
android:onClick="onClickDialog" />
Activity中，Dialog代码：
/**
* 点击打开对话框
* @param v
*/
@SuppressWarnings("deprecation")
public void onClickDialog(View v) {
Log.d(tag, "onClickDialog");
showDialog(0);
}
/**
* 需要重写创建Dialog方法
*/
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0:
Builder builder = new AlertDialog.Builder(this); //创建一个对话框
builder.setTitle("Android 对话框"); //设置标题
builder.setMessage("message"); //设置message
builder.setIcon(android.R.drawable.ic_dialog_info); //设置图标
builder.setView(new EditText(this)); //设置一个填写的框
builder.setMultiChoiceItems(new String[] {"选项1","选项2","选项3","选项4"}, null, null); //选择框
builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "YES!", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "NO!", Toast.LENGTH_SHORT).show();
}
});
return builder.create();
}
return null;
}
进度对话框：
layout中第二个按钮就是调用进度对话框，进度对话框可以显示程序运行进度。
<Button
android:id="@+id/btn_dialogs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/progressDialog"
android:onClick="onClickProgressDialog" />
Activity中，我们需要创建一个进度Dialog:
/**
* 点击打开进度条
* @param v
*/
public void onClickProgressDialog(View v) {
Log.d(tag, "onClickProgressDialog");
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setTitle("ProgressDialog"); //设置标题
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); //设置样式
progressDialog.setMessage("please wait...");
progressDialog.setProgress(0); //设置进度开始点
progressDialog.setMax(100); //进度最大是100
progressDialog.show();
new Thread(new Runnable() {
public void run() {
try {
//每1秒后，进度条显示10%
Thread.sleep(1000);
progressDialog.setProgress(10); //每隔1秒就可以设置10
Thread.sleep(1000);
progressDialog.setProgress(20);
Thread.sleep(1000);
progressDialog.setProgress(30);
Thread.sleep(1000);
progressDialog.setProgress(40);
Thread.sleep(1000);
progressDialog.setProgress(50);
Thread.sleep(1000);
progressDialog.setProgress(60);
Thread.sleep(1000);
progressDialog.setProgress(70);
Thread.sleep(1000);
progressDialog.setProgress(90);
Thread.sleep(1000);
progressDialog.setProgress(100);
Thread.sleep(1000);
progressDialog.dismiss();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
消息模式弹出框：
Toast.makeText(getBaseContext(), "YES!", Toast.LENGTH_SHORT).show();
也可以自定义：
Toast toast=Toast.makeText(getApplicationContext(), "显示带图片的toast", 3000);
toast.setGravity(Gravity.CENTER, 0, 0);
//创建图片视图对象
ImageView imageView= new ImageView(getApplicationContext());
//设置图片
imageView.setImageResource(R.drawable.ic_launcher);
//获得toast的布局
LinearLayout toastView = (LinearLayout) toast.getView();
//设置此布局为横向的
toastView.setOrientation(LinearLayout.HORIZONTAL);
//将ImageView在加入到此布局中的第一个位置
toastView.addView(imageView, 0);
toast.show();