AlertDialog

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AlertDialog简介

AlertDialog可以在当前的界面弹出一个对话框，这个对话框是置顶于所有的界面纸上的，能够屏蔽掉其他空间的交互能力，因此一般AlertDialog都是用于提示一些非常重要的内容或者警告信息。比如为了防止用户误删重要的内容，在删除前弹出一个确认对话框。

1.最简单的dialog

AlertDialog.Builderbuilder=new AlertDialog.Builder(MainActivity.this);builder.setIcon(放图标).settitle(设置标题).setMessage(设置提示内容).setNegativebutton(设置点击事件).setNeutralButton(设置点击事件).setPositiveButton(设置点击事件);AlertDialog alertDialog=builder.creat();alertDialog.show();

//最简单的dialog    private void showdialog1() {        AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);        builder.setIcon(R.mipmap.ic_launcher).setTitle("我是一个Dialog").setMessage("我是Dialog的内容").setNegativeButton("取消", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        Toast.makeText(getApplication(), "点击的是NegativeButton", Toast.LENGTH_SHORT).show();                    }                }        ).setNeutralButton("NeutralButton", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(getApplication(),"点击的是NeutralButton",Toast.LENGTH_SHORT).show();            }        }).setPositiveButton("确定", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(getApplication(),"点击的是PositiveButton",Toast.LENGTH_SHORT).show();            }        });        AlertDialog alertDialog=builder.create();        alertDialog.show();    }

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2.选择某条信息
setItems

//弹出多条数据    private void selectdialog() {        AlertDialog.Builder builder2=new AlertDialog.Builder(MainActivity.this);        builder2.setTitle("选择的Dialog");        builder2.setItems(mData, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(getApplication(), "选中了第" + which + "条数据", Toast.LENGTH_SHORT).show();            }        });        AlertDialog alertDialog1=builder2.create();        alertDialog1.show();        return;    }

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3.单选框的dialog
setSingleChoiceItems

  //单选dialog    private void singleSelect() {        AlertDialog.Builder builder3=new AlertDialog.Builder(MainActivity.this);        builder3.setSingleChoiceItems(mSex, 0, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                sex = mSex[which];                Toast.makeText(getApplicationContext(), "你选择的性别是" + mSex[which], Toast.LENGTH_SHORT).show();            }        });        builder3.setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {            }        });        builder3.setNeutralButton("确定", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                mBtnDialog3.setText("您的性别是" + sex);            }        });        AlertDialog alertDialog2=builder3.create();        alertDialog2.show();    }

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4.多选框dialog
setMultiChoiceItems

//多选dialog    private void mulselect() {        AlertDialog.Builder builder4=new AlertDialog.Builder(MainActivity.this);        builder4.setMultiChoiceItems(mHobby, mIsChecked, new DialogInterface.OnMultiChoiceClickListener() {            @Override            public void onClick(DialogInterface dialog, int which, boolean isChecked) {                mIsChecked[which] = isChecked;            }        });        builder4.setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {            }        });        builder4.setNeutralButton("确定", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                hobby = new StringBuffer();                for (int i = 0; i < mIsChecked.length; i++) {                    if (mIsChecked[i]) {                        hobby.append(mHobby[i]);                    }                }                mBtnDialog4.setText("您的爱好是" + hobby);            }        });        Dialog dialog=builder4.create();        dialog.show();    }

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