android-对话框

三种：Dialog、Dialog主题活动、Toast

Dialog(Alert)

        Dialog d = new Dialog(MyActivity.this);
        //使用新窗口为它遮挡的窗口着色，并模糊它
        Window window = d.getWindow();
        window.setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
        
        //设置标题
        d.setTitle("Dialog Title");
        //扩充布局
        d.setContentView(R.layout.dialog_view);
        
        //找出布局中使用的TextView并设置其文本值
        TextView text = (TextView)d.findViewById(R.id.dialogTextView);
        text.setText("This is the text in my dialog");
        d.show(); 

        AlertDialog.Builder ad = new AlertDialog.Builder(context);
        ad.setTitle("title");
        ad.setMessage("message");
        ad.setPositiveButton("button1", new OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
                
            }
        });
        ad.setNegativeButton("button2", new OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
                
            }
        });
        ad.setCancelable(true);
        ad.setOnCancelListener(new OnCancelListener() {
            
            @Override
            public void onCancel(DialogInterface dialog) {        
                
            }
        })；
        ad.show();

Dialog主题活动

<activity android:name="MyDialogActivity" android:theme="@android:style/Theme.Dialog">
</activity>

Toast

Toast.makeText(this, String.format("名字 %s，性别 %s，年龄 %d", data.getUserName(),data.getSex(),data.getAge()), Toast.LENGTH_SHORT).show();

对话框的管理

在activity中的OnCreateDialog和onPrepareDialog事件处理程序可以保存和管理对话框。在第一次到onCreateDialog中创建对话框之后，之后每一次调用showDialog都会触发onPrepareDialog，在这方法内可以修改所要显示的值

    static final private int TIME_DIALOG = 1;
    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case (TIME_DIALOG):
            AlertDialog.Builder timeDialog = new AlertDialog.Builder(this);
            timeDialog.setTitle("titile");
            timeDialog.setMessage("message");
            return timeDialog.create();
        }
        return null;
    }
    
    @Override
    protected void onPrepareDialog(int id, Dialog dialog) {
        switch (id) {
        case (TIME_DIALOG):
            AlertDialog timeDialog = (AlertDialog) dialog;
            timeDialog.setMessage("new message");
            break;
        }
    }
    showDialog(TIME_DIALOG);