基本Dialog的使用

• 布局

    <LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity" >
  
    <Button
        android:onClick="click1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="确定取消对话框" />
    <Button
        android:onClick="click2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="单选对话框" />
    <Button
        android:onClick="click3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="多选对话框" />
    <Button
        android:onClick="click4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="进度对话框" />
    <Button
        android:onClick="click5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="进度条对话框" />
  
    </LinearLayout>
  

• 代码

    public class MainActivity extends Activity {
  
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	setContentView(R.layout.activity_main);
    }
    //确定取消对话框
    	public void click1(View view) {
    		
    		//1.创建Buidler对象
    		AlertDialog.Builder builder = new AlertDialog.Builder(this);
    		
    		//2.设置标题
    		builder.setTitle("警告");
    		//3.设置提示信息
    		builder.setMessage("欲练此功，必先自宫");
    		
    		//4.设置确定按钮
    		builder.setPositiveButton("确定", new OnClickListener() {
    			
  
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
    				Toast.makeText(MainActivity.this, "啊。。。", 0).show();
    				
    			}
    		});
    		
    		builder.setNegativeButton("取消", new OnClickListener() {
    			
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
    				Toast.makeText(MainActivity.this, "容我三思", 0).show();
    			}
    		});
    		
    		AlertDialog dialog = builder.create();
    		
    		//记得显示对话框
    		dialog.show();
    	}
    	
    	int checkedItem = 0;//默认选择条目下标，If -1 no items are checked
    	//单选对话框
    	public void click2(View v) {
    		
    		AlertDialog.Builder builder = new AlertDialog.Builder(this);
    		
    		builder.setTitle("请选择性别");
    		
    		checkedItem = -1;
    		
    		final String[] items = {"男","女","保密"};//单选的范围相应数组
    		
    		builder.setSingleChoiceItems(items, checkedItem, new OnClickListener() {
    			
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
    				checkedItem = which;//which就是选择项目下标
    			}
    		});
    		
    		//4.设置确定按钮
    		builder.setPositiveButton("确定", new OnClickListener() {
    			
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
    				Toast.makeText(MainActivity.this, "性别选择了: " + items[checkedItem], 0).show();
    				
    			}
    		});
    		
    		builder.show();//直接用builder对象调用show()方法
    		
    	}
    	
    	//进度对话框
    	public void click4(View v) {
    		
    		final ProgressDialog dialog = new ProgressDialog(this);
    		
    		dialog.setTitle("提示");
    		dialog.setMessage("正在加载");
    		
    		dialog.show();
    		new Thread(new Runnable() {
    			
    			@Override
    			public void run() {
    				SystemClock.sleep(3000);
    				dialog.dismiss();
    				
    			}
    		}).start();
    	}
    	
    	//进度条对话框
    	public void click5(View v) {
    		
    		final ProgressDialog dialog = new ProgressDialog(this);
    		
    		dialog.setTitle("提示");
    		
    		dialog.setMax(10);//设置最大值
    		//设置样式STYLE_HORIZONTAL，默认STYLE_SPINNER 圆环
    		dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
    		
    		new Thread(new Runnable() {
    			
    			@Override
    			public void run() {
    				
    				for(int i = 0;i <= 10;i++){
    					dialog.setProgress(i);
    					
    					SystemClock.sleep(500);
    				}
    				
    				//当任务完成需要消除对话框
    				dialog.dismiss();
    			}
    		}).start();
    		
    		dialog.show();
    	}
    	
    	//多选对话框
    	public void click3(View v) {
    		
    		AlertDialog.Builder builder = new AlertDialog.Builder(this);
    		
    		builder.setTitle("请选择兴趣");
    		
    		final String[] items = {"吃饭","睡觉","写代码","打游戏"};//可多选的范围数组
    		final boolean [] checkedItems = {true, true,false,false};//选择了哪个项目
    		
    		builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {
    			
    			//参数2 选择哪一项
    			//参数3 这个项目是选上还是没选上
    			@Override
    			public void onClick(DialogInterface dialog, int which, boolean isChecked) {
    				
    				checkedItems[which] = isChecked;
    			}
    		});
    		
    		//4.设置确定按钮
    		builder.setPositiveButton("确定", new OnClickListener() {
    			
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
  
    				String result = "";
    				for(int i = 0;i < checkedItems.length;i++){
    					//如果某一项被选择
    					if(checkedItems[i]){
    						result += items[i] + " ";
    					}
    				}
    				
    				Toast.makeText(MainActivity.this, "兴趣选择了: " + result, 0).show();
    			}
    		});
    		
    		builder.show();//直接用builder对象调用show()方法
    	}
    }