Android对话框

1.系统对话框

代码如下：

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode==KeyEvent.KEYCODE_BACK){
            final AlertDialog.Builder builder1=new AlertDialog.Builder(CustomDialogActivity.this);
            builder1.setTitle("系统");
            builder1.setMessage("对话框");
            builder1.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    finish();
                }
            });
            builder1.setNegativeButton("取消",null);
            builder1.show();
        }

        return super.onKeyDown(keyCode, event);
    }

点击Back键，显示系统对话框，效果如图：

2.自定义对话框

代码如下：

button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder=new AlertDialog.Builder(CustomDialogActivity.this);
                builder.setTitle("自定义");
                builder.setView(R.layout.custommessage_item);
                builder.setCancelable(false);
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                });
                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                });
                builder.show();
            }
        });

效果如图：

3.圆形对话框

代码如下：

button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ProgressDialog pd=new ProgressDialog(CustomDialogActivity.this);
                pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                pd.setTitle("对话框");
                pd.setIcon(R.mipmap.ic_launcher);
                pd.setMessage("圆形对话框");
                pd.setIndeterminate(false);
                pd.setCancelable(true);
                pd.setButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                    }
                });
                pd.show();
            }
        });

效果如图：

4.年月日对话框

代码如下：

 button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DatePickerDialog datePickerDialog=new DatePickerDialog(CustomDialogActivity.this, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker datePicker, int year, int month, int day) {
                        Toast.makeText(CustomDialogActivity.this, "所选择的日期:"+year+"-"+(month+1)+"-"+day, Toast.LENGTH_SHORT).show();
                    }
                },2018,0,17);
                datePickerDialog.show();
            }
        });

效果如图：

5.钟表对话框

代码如下：

button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                TimePickerDialog timePickerDialog=new TimePickerDialog(CustomDialogActivity.this, new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker timePicker, int h, int m) {
                        button4.setText(h+":"+m);
                    }
                },30,20,true);
                timePickerDialog.show();
            }
        });

效果如图：

6.进度条对话框

代码如下：

package com.example.exercisehomework;

import android.app.ProgressDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class Main3Activity extends AppCompatActivity {
    private Button jindutiao;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        jindutiao=findViewById(R.id.jindutiao);

        jindutiao.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                final int MAX_PROGRESS = 100;
                final ProgressDialog progressDialog =
                        new ProgressDialog(Main3Activity.this);
                progressDialog.setProgress(0);
                progressDialog.setTitle("进度条对话框");
                progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                progressDialog.setMax(MAX_PROGRESS);
                progressDialog.show();
    /* 模拟进度增加的过程
     * 新开一个线程，每个100ms，进度增加1
     */
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        int progress= 0;
                        while (progress < MAX_PROGRESS){
                            try {
                                Thread.sleep(100);
                                progress++;
                                progressDialog.setProgress(progress);
                            } catch (InterruptedException e){
                                e.printStackTrace();
                            }
                        }
                        // 进度达到最大值后，窗口消失
                        progressDialog.cancel();
                    }
                }).start();

            }
        });
    }
}

效果如图：