Android对话框AlertDialog与DatePickerDialog及TimePickerDialog使用详解

    <Button
        Android:id="@+id/btn_alert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="弹出提醒对话框"/>
    <TextView
        android:id="@+id/tv_alert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"/>

public class AlertDialogActivity extends AppCompatActivity implements View.OnClickListener {
    private TextView tv_alert;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alert_dialog);
        findViewById(R.id.btn_alert).setOnClickListener(this);
        tv_alert = findViewById(R.id.tv_alert);
    }
    @Override
    public void onClick(View view) {
        //创建提醒对话框的建造器
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        //设置对话框的标题文本
        builder.setTitle("尊敬的用户");
        //设置对话的内容文本
        builder.setMessage("确定卸载？");
        //设置对话框的肯定按钮文本及其监听器
        builder.setPositiveButton("卸载",(dialog,which) -> {
           tv_alert.setText("再见");
        });
        builder.setNegativeButton("再想想",(dialog,which) -> {
            tv_alert.setText("留下来");
        });
        //根据建造器构建对话框
        AlertDialog dialog = builder.create();
        dialog.show();
    }
}

<LinearLayout xmlns:android="Http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp">
    <Button
        android:id="@+id/btn_date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请选择日期"/>
    <TextView
        android:id="@+id/tv_date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

public class DatePickerActivity extends AppCompatActivity implements View.OnClickListener, DatePickerDialog.OnDateSetListener {
    private DatePicker dp_date;
    private TextView tv_date;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_date_picker);
        findViewById(R.id.btn_date).setOnClickListener(this);
        tv_date = findViewById(R.id.tv_date);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_date:
                //获取日历实例，里面包含了当前的年月日
                Calendar calendar = Calendar.getInstance();
                DatePickerDialog dialog = new DatePickerDialog(this,this,calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH));
                //显示日期对话框
                dialog.show();
                break;
        }
    }
    @Override
    public void onDateSet(DatePicker datePicker, int year, int month, int dayOfMonth) {
        String desc = String.fORMat("您选择的日期是%d年%d月%d日",year,month+1,dayOfMonth);
        tv_date.setText(desc);
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp">
    <DatePicker
        android:id="@+id/dp_date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:datePickerMode="spinner"
        android:calendarViewShown="false"/>
    <Button
        android:id="@+id/btn_ok"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="确定"/>
    <TextView
        android:id="@+id/tv_date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

public class DatePickerActivity extends AppCompatActivity implements View.OnClickListener {
    private DatePicker dp_date;
    private TextView tv_date;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_date_picker);
        findViewById(R.id.btn_ok).setOnClickListener(this);
        tv_date = findViewById(R.id.tv_date);
        dp_date = findViewById(R.id.dp_date);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_ok:
                String desc = String.format("您选择的日期是%d年%d月%d日",dp_date.getYear(),dp_date.getMonth()+1,dp_date.getDayOfMonth());
                tv_date.setText(desc);
                break;
        }
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp">
    <Button
        android:id="@+id/btn_time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请选择时间"/>
    <TextView
        android:id="@+id/tv_time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

public class TimePickerActivity extends AppCompatActivity implements View.OnClickListener, TimePickerDialog.OnTimeSetListener {
    private TextView tv_time;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_time_picker);
        findViewById(R.id.btn_time).setOnClickListener(this);
        tv_time = findViewById(R.id.tv_time);
    }
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.btn_time:
                //获取日历
                Calendar calendar = Calendar.getInstance();
                //构建时间话对话框
                TimePickerDialog dialog = new TimePickerDialog(this,this,calendar.get(Calendar.HOUR_OF_DAY),calendar.get(Calendar.MINUTE),true);
                dialog.show();
                break;
        }
    }
    @Override
    public void onTimeSet(TimePicker timePicker, int hourOfDay, int minute) {
        String desc = String.format("您选择的日期是%d时%d分",hourOfDay,minute);
        tv_time.setText(desc);
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp">
    <TimePicker
        android:id="@+id/tp_time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:timePickerMode="spinner"/>
    <Button
        android:id="@+id/btn_ok"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="确定"/>
    <TextView
        android:id="@+id/tv_time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

public class TimePickerActivity extends AppCompatActivity implements View.OnClickListener{
    private TimePicker tp_time;
    private TextView tv_time;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_time_picker);
        findViewById(R.id.btn_ok).setOnClickListener(this);
        tp_time = findViewById(R.id.tp_time);
        tp_time.setIs24HourView(true);
        tv_time = findViewById(R.id.tv_time);
    }
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.btn_ok:
                String desc = String.format("您选择的日期是%d时%d分",tp_time.getCurrentHour(),tp_time.getCurrentMinute());
                tv_time.setText(desc);
                break;
        }
    }
}