基本Dialog的使用

• 布局

  
  
  
  
  

• 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
  }
  }