Android复习笔记(10) -对话框的使用

使用Alertdialog,话不多说，直接上代码

String[] items = new String[] {"xx", "yyy", "zzz"};

 int selected = 0;

 boolean[] selections = new boolean[] { false, false, false };

 

 //普通对话框

 public void dialog1(View v) {

  AlertDialog.Builder builder = new AlertDialog.Builder(this);

  builder.setTitle("Hello World").

   setMessage("Hello World Text")

   .setCancelable(false) //设置不可被取消

   .setPositiveButton("确定", listener1)

   .setNegativeButton("取消", listener1)

   .setNeutralButton("稍后", listener1);

  builder.show();

 }

 

 

 

 //单选对话框

 public void dialog2(View v) {

 

  new AlertDialog.Builder(this)

   .setTitle("单选Demo")

   .setSingleChoiceItems(items, -1, listener2)

   .setPositiveButton("确定", listener2)

   .show();

 }

 

 //多选对话框

 public void dialog3(View v) {

  new AlertDialog.Builder(this)

  .setTitle("单选Demo")

  .setMultiChoiceItems(items, selections, listener3)

  .setPositiveButton("确定", listener4)

  .show();

 }

 

 OnClickListener listener4 = new OnClickListener() {

  @Override

  public void onClick(DialogInterface dialog, int which) {

   StringBuilder sb = new StringBuilder();

   for (int i = 0; i < items.length; i++) {

    sb.append(selections[i] ? items[i] + " " : "");

   }

   Toast.makeText(getApplicationContext(), sb.toString(), Toast.LENGTH_SHORT).show();

  }

 };

 

 OnMultiChoiceClickListener listener3 = new OnMultiChoiceClickListener() {

 

  @Override

  public void onClick(DialogInterface dialog, int which, boolean isChecked) {

   selections[which] = isChecked;

   System.out.println(items[which] + ": " + isChecked);

  }

 };

 

 OnClickListener listener2 = new OnClickListener() {

  @Override

  public void onClick(DialogInterface dialog, int which) {

   switch (which) {

   case DialogInterface.BUTTON_POSITIVE:

    Toast.makeText(getApplicationContext(), "确定", Toast.LENGTH_SHORT).show();

    Toast.makeText(getApplicationContext(), items[selected], 0).show();

    break;

   default:

    Toast.makeText(getApplicationContext(), items[which], 0).show();

    selected = which;

    break;

   }

  }

 };

   

 OnClickListener listener1 = new OnClickListener() {

 

  @Override

  public void onClick(DialogInterface dialog, int which) {

   switch (which) {

   case DialogInterface.BUTTON_POSITIVE:

    Toast.makeText(getApplicationContext(), "确定", Toast.LENGTH_SHORT).show();

    break;

   case DialogInterface.BUTTON_NEGATIVE:

    Toast.makeText(getApplicationContext(), "取消", Toast.LENGTH_SHORT).show();

    break;

   case DialogInterface.BUTTON_NEUTRAL:

    Toast.makeText(getApplicationContext(), "稍后", Toast.LENGTH_SHORT).show();

    break;

   }

  }

 };