我正在尝试制作一个允许用户安排约会的应用。我是一个相当陌生的Android,我正在通过Android Boot Camp预订。我可以使用日期选择器,但是当我点击时间选择器的按钮时,没有任何反应。我一直盯着这个,这句话开始模糊起来,所以我想我会寻求帮助。
这是我的.xml代码
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:padding="0dp"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.massagescheduler.MainActivity" >
<ImageView
android:id="@+id/imgMass"
android:layout_width="246dp"
android:layout_height="match_parent"
android:contentDescription="@string/imgMass"
android:src="@drawable/vmassage" />
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TableRow>
<View android:layout_height="40dp" />
<TextView
android:id="@+id/txtTitle"
android:layout_width="wrap_content"
android:background="#B0C4DE"
android:gravity="fill_horizontal"
android:text="@string/txtTitle"
android:textSize="30sp"
android:typeface="serif" />
</TableRow>
<TableRow>
<View android:layout_height="50dp" />
<TextView
android:id="@+id/txtDescription"
android:layout_width="wrap_content"
android:layout_gravity="left"
android:padding="20dp"
android:text="@string/txtDescription"
android:textSize="20sp" />
</TableRow>
<TableRow>
<View android:layout_height="25dp" />
<Button
android:id="@+id/btnDate"
android:layout_width="wrap_content"
android:gravity="fill_horizontal"
android:padding="20dp"
android:text="@string/btnDate"
android:textSize="20sp" />
</TableRow>
<TableRow>
<View android:layout_height="25dp" />
<Button
android:id="@+id/btnTime"
android:layout_width="wrap_content"
android:gravity="fill_horizontal"
android:padding="20dp"
android:text="@string/btnTime"
android:textSize="20sp" />
</TableRow>
<TableRow>
<View android:layout_height="50dp" />
<TextView
android:id="@+id/txtReservation"
android:layout_gravity="center_vertical"
android:padding="20dp"
android:textSize="25sp" />
</TableRow>
</TableLayout>
这是我的Java代码:
package com.example.massagescheduler;
import java.text.DateFormat;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;
public class MainActivity extends Activity {
private TextView reservation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
reservation = (TextView) findViewById(R.id.txtReservation);
Button btDate = (Button) findViewById(R.id.btnDate);
Button btTime = (Button) findViewById(R.id.btnTime);
btDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(MainActivity.this, d,
c.get(Calendar.YEAR), c.get(Calendar.MONTH), c
.get(Calendar.DAY_OF_MONTH)).show();
}
});
btTime.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new TimePickerDialog(MainActivity.this, t,
c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
false);
}
});
}
Calendar c = Calendar.getInstance();
DateFormat fmtDate = DateFormat.getDateInstance();
DateFormat fmtTime = DateFormat.getTimeInstance();
DatePickerDialog.OnDateSetListener d = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, monthOfYear);
c.set(Calendar.DAY_OF_MONTH, dayOfMonth);
reservation.setText("Your reservation is set for "
+ fmtDate.format(c.getTime()));
}
};
TimePickerDialog.OnTimeSetListener t = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hour, int minute) {
// TODO Auto-generated method stub
c.set(Calendar.HOUR_OF_DAY, hour);
c.set(Calendar.MINUTE, minute);
reservation.setText("Your reservation is set for "
+ fmtTime.format(c.getTime()));
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
非常感谢任何帮助。
答案 0 :(得分:0)
您忘了拨打TimePickerDialog#show()
。
new TimePickerDialog(MainActivity.this, t,
c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
false).show(); // MISSING!