(1)闹钟
public void createAlarm(String message, int hour, int minutes)
{
Intent intent = new Intent(AlarmClock.ACTION_SET_ALARM)
.putExtra(AlarmClock.EXTRA_MESSAGE, message) //用于标识闹钟的自定义消息
.putExtra(AlarmClock.EXTRA_HOUR, hour) //闹钟的小时
.putExtra(AlarmClock.EXTRA_MINUTES, minutes); //闹钟的分钟
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
注:为了调用ACTION_SET_ALARM,应用必须在清单文件中注册SET_ALARM权限:
示例 Intent 过滤器:
public void startTimer(String message, int seconds)
{
Intent intent = new Intent(AlarmClock.ACTION_SET_TIMER)
.putExtra(AlarmClock.EXTRA_MESSAGE, message) //用于标识定时器的自定义消息
.putExtra(AlarmClock.EXTRA_LENGTH, seconds) //以秒为单位的定时器定时长度
.putExtra(AlarmClock.EXTRA_SKIP_UI, true); //一个布尔型值,用于指定响应定时器的应用在设置定时器时是否应跳过其 UI。
//若为 true,则应用应跳过任何确认 UI,直接启动指定的定时器。
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
注:为了调用ACTION_SET_TIMER,应用必须在清单文件中注册SET_ALARM权限:
示例 Intent 过滤器:
(2)日历
public void addEvent(String title, String location, Calendar begin, Calendar end)
{
Intent intent = new Intent(Intent.ACTION_INSERT)
.setData(Events.CONTENT_URI) //指定内容URI
.putExtra(Events.TITLE, title) //事件标题
.putExtra(Events.EVENT_LOCATION, location) //事件地点
.putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME, begin) //事件的开始时间(从新纪年开始计算的毫秒数)
.putExtra(CalendarContract.EXTRA_EVENT_END_TIME, end); //事件的结束时间(从新纪年开始计算的毫秒数)
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
(3)相机
static final int REQUEST_IMAGE_CAPTURE = 1;
static final Uri mLocationForPhotos;
public void capturePhoto(String targetFilename)
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //使用相机拍照
intent.putExtra(MediaStore.EXTRA_OUTPUT, //设置相机应用应将照片或视频文件保存到的 URI 位置
Uri.withAppendedPath(mLocationForPhotos, targetFilename));
if (intent.resolveActivity(getPackageManager()) != null) //确认存在对应Activity组件再开启
{
//通过startActivityForResult获得Intent中返回缩小尺寸的照片副本(缩略图)
startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK)
{
//拍照获得的副本(缩略图)以Bitmap形式保存在名为 "data"的 extra 字段中
Bitmap thumbnail = data.getParcelable("data");//获得副本Bitmap
//此外,还可以通过URI访问原始尺寸的照片或视频,该URI为上面通过EXTRA_OUTPUT设置的URI
// Do other work with full size photo saved in mLocationForPhotos
...
}
}
示例 Intent 过滤器:
处理此 Intent 的Activity 应检查传入Intent中有无EXTRA_OUTPUT extra,然后将拍摄的图像或视频保存在该 extra 指定的位置,并调用带Intent的setResult(),该 Intent 将经过压缩的缩略图包括在名为 "data"的 extra中,注意相关权限的注册。
public void capturePhoto()
{
Intent intent = new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);
//Intent intent = new Intent(MediaStore.INTENT_ACTION_VIDEO_CAMERA);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivityForResult(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
(4)联系人
static final int REQUEST_SELECT_CONTACT = 1;
public void selectContact()
{
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
if (intent.resolveActivity(getPackageManager()) != null)
{
//回调的结果Intent包含指向所选联系人的 content:URI,
//响应会利用Contacts Provide API 为我们的应用授予该联系人的临时读取权限,
//即使我们的应用不具READ_CONTACTS权限也没有关系。
startActivityForResult(intent, REQUEST_SELECT_CONTACT); //确认存在对应Activity组件再开启
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_SELECT_CONTACT && resultCode == RESULT_OK)
{
Uri contactUri = data.getData(); //取出包含指向所选联系人的 content:URI,读取该联系人的详情并不需要READ_CONTACTS权限
// Do something with the selected contact at contactUri
...
}
}
static final int REQUEST_SELECT_PHONE_NUMBER = 1;
public void selectContact()
{
// Start an activity for the user to pick a phone number from contacts
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(CommonDataKinds.Phone.CONTENT_TYPE);//从有电话号码的联系人中选取
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivityForResult(intent, REQUEST_SELECT_PHONE_NUMBER); //确认存在对应Activity组件再开启
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_SELECT_PHONE_NUMBER && resultCode == RESULT_OK)
{
Uri contactUri = data.getData(); //得到指向所选联系人数据的 content:URI
String[] projection = new String[]{CommonDataKinds.Phone.NUMBER};
Cursor cursor = getContentResolver().query(contactUri, projection,
null, null, null); //从联系人提供程序中查询电话号码
if (cursor != null && cursor.moveToFirst()) { //若cursor的返回值有效,取出查询到的电话号码
int numberIndex = cursor.getColumnIndex(CommonDataKinds.Phone.NUMBER);
String number = cursor.getString(numberIndex);
//对取出的电话号码进行一些操作
...
}
}
}
由于查询出来的cursor的初始位置是指向第一条记录的前一个位置的,故使用cursor.moveToFirst()函数来指向查询结果的第一个位置。一般通过判断cursor.moveToFirst()的值为true或false来确定查询结果是否为空。
public void viewContact(Uri contactUri)
{
Intent intent = new Intent(Intent.ACTION_VIEW, contactUri);//无需指定MIME类型,该类型可以从联系人URI中推断得出
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent);
}
}
public void editContact(Uri contactUri, String email)
{
Intent intent = new Intent(Intent.ACTION_EDIT);
intent.setData(contactUri);
//可使用ContactsContract.Intents.Insert中定义的一个或多个extra,来填充联系人详情字段
intent.putExtra(Intents.Insert.EMAIL, email);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
public void insertContact(String name, String email)
{
Intent intent = new Intent(Intent.ACTION_INSERT);
intent.setType(Contacts.CONTENT_TYPE);
//可使用ContactsContract.Intents.Insert中定义的一个或多个extra
intent.putExtra(Intents.Insert.NAME, name);
intent.putExtra(Intents.Insert.EMAIL, email);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
(5)电子邮件
public void composeEmail(String[] addresses, String subject, Uri attachment)
{
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("*/*");
intent.putExtra(Intent.EXTRA_EMAIL, addresses);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
intent.putExtra(Intent.EXTRA_STREAM, attachment);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
如果您想确保 Intent 只由电子邮件应用(而非其他短信或社交应用)进行处理,则需使用 ACTION_SENDTO操作并加入 "mailto:"数据架构。例如:
public void composeEmail(String[] addresses, String subject)
{
Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("mailto:")); // 只有电子邮件应用才能处理
intent.putExtra(Intent.EXTRA_EMAIL, addresses);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
(6)文件存储
static final int REQUEST_IMAGE_GET = 1;public void selectImage()
{
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivityForResult(intent, REQUEST_IMAGE_GET); //确认存在对应Activity组件再开启
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_IMAGE_GET && resultCode == RESULT_OK)
{
Bitmap thumbnail = data.getParcelable("data");
Uri fullPhotoUri = data.getData();
// Do work with photo saved at fullPhotoUri
...
}
}
用于返回照片的示例 Intent 过滤器:
static final int REQUEST_IMAGE_OPEN = 1;
public void selectImage()
{
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.setType("image/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
//只有系统能接收到ACTION_OPEN_DOCUMENT, 所以此处不需要判断Activity是否存在
startActivityForResult(intent, REQUEST_IMAGE_OPEN);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_IMAGE_OPEN && resultCode == RESULT_OK)
{
Uri fullPhotoUri = data.getData();
// Do work with full size photo saved at fullPhotoUri
...
}
}
第三方应用实际上无法通过ACTION_OPEN_DOCUMENT操作响应 Intent,而是由系统接收此 Intent,然后在统一用户界面中显示各类应用提供的所有文件。
如需在该用户界面中提供我们的应用的文件,并允许其他应用打开它们,则必须实现一个DocumentsProvider,并加入一个PROVIDER_INTERFACE Intent 过滤器("android.content.action.DOCUMENTS_PROVIDER")。例如:
(7)本地操作
public void callCar()
{
Intent intent = new Intent(ReserveIntents.ACTION_RESERVE_TAXI_RESERVATION);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
public void showMap(Uri geoLocation)
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(geoLocation);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
public void playMedia(Uri file)
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(file);
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
public void dialPhoneNumber(String phoneNumber)
{
Intent intent = new Intent(Intent.ACTION_DIAL);
intent.setData(Uri.parse("tel:" + phoneNumber));
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
public void composeMmsMessage(String message, Uri attachment)
{
Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setType(HTTP.PLAIN_TEXT_TYPE);
intent.putExtra("sms_body", message); //表示消息正文的字符串
intent.putExtra(Intent.EXTRA_STREAM, attachment); //指向附件的图像或视频的Uri
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
如果想确保 Intent 只由短信应用(而非其他电子邮件或社交应用)进行处理,则需使用ACTION_SENDTO操作并设置data "smsto:"。例如:
public void composeMmsMessage(String message, Uri attachment)
{
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setData(Uri.parse("smsto:")); //确保只有短信应用进行处理
intent.putExtra("sms_body", message); //表示消息正文的字符串
intent.putExtra(Intent.EXTRA_STREAM, attachment); //指向附件的图像或视频的Uri
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent); //确认存在对应Activity组件再开启
}
}
示例 Intent 过滤器:
public void openWifiSettings()
{
Intent intent = new Intent(Intent.ACTION_WIFI_SETTINGS); //打开Wifi设置界面
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent);
}
}
public void searchWeb(String query)
{
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY, query);//在SearchManager.QUERY extra 中指定搜索字符串
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent);
}
}
转自:
https://www.jianshu.com/p/910108cc837b