Android URI学习

uri与file、path相互转化

1、uri转file:

file = new File(new URI(uri.toString()));

2、file转uri:

URI uri = file.toURI();

3、uri转path:

private String getPath(Context context, Uri uri) {  
        String path = null;
        Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
        if (cursor == null) {
            return null;
        }
        if (cursor.moveToFirst()) {
            try {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        cursor.close();
        return path;
 }

 4、path转uri:

 Uri uri = Uri.parse(path);

 5、file转path:

 String path = file.getPath();

 6、path转file:

 File file = new File(path);

 7、常用Uri

显示网页: 
  1. Uri uri = Uri.parse("http://www.google.com"); 
  2. Intent it = new Intent(Intent.ACTION_VIEW,uri); 
  3. startActivity(it); 
 
显示地图: 
  1. Uri uri = Uri.parse("geo:38.899533,-77.036476"); 
  2. Intent it = new Intent(Intent.Action_VIEW,uri); 
  3. startActivity(it); 
 
路径规划: 
  1. Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en"); 
  2. Intent it = new Intent(Intent.ACTION_VIEW,URI); 
  3. startActivity(it); 
 
拨打电话: 
调用拨号程序 
  1. Uri uri = Uri.parse("tel:xxxxxx"); 
  2. Intent it = new Intent(Intent.ACTION_DIAL, uri);   
  3. startActivity(it);   
  1. Uri uri = Uri.parse("tel.xxxxxx"); 
  2. Intent it =new Intent(Intent.ACTION_CALL,uri); 
  3. 要使用这个必须在配置文件中加入 
 
发送SMS/MMS 
调用发送短信的程序 
  1. Intent it = new Intent(Intent.ACTION_VIEW); 
  2. it.putExtra("sms_body", "The SMS text"); 
  3. it.setType("vnd.android-dir/mms-sms"); 
  4. startActivity(it);   
发送短信 
  1. Uri uri = Uri.parse("smsto:0800000123"); 
  2. Intent it = new Intent(Intent.ACTION_SENDTO, uri); 
  3. it.putExtra("sms_body", "The SMS text"); 
  4. startActivity(it);   
发送彩信 
  1. Uri uri = Uri.parse("content://media/external/images/media/23"); 
  2. Intent it = new Intent(Intent.ACTION_SEND); 
  3. it.putExtra("sms_body", "some text"); 
  4. it.putExtra(Intent.EXTRA_STREAM, uri); 
  5. it.setType("image/png"); 
  6. startActivity(it); 
 
发送Email 
  1. 
  2. Uri uri = Uri.parse("mailto:xxx@abc.com"); 
  3. Intent it = new Intent(Intent.ACTION_SENDTO, uri); 
  4. startActivity(it); 
  1. Intent it = new Intent(Intent.ACTION_SEND); 
  2. it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com"); 
  3. it.putExtra(Intent.EXTRA_TEXT, "The email body text"); 
  4. it.setType("text/plain"); 
  5. startActivity(Intent.createChooser(it, "Choose Email Client"));   
  1. Intent it=new Intent(Intent.ACTION_SEND);   
  2. String[] tos={"me@abc.com"};   
  3. String[] ccs={"you@abc.com"};   
  4. it.putExtra(Intent.EXTRA_EMAIL, tos);   
  5. it.putExtra(Intent.EXTRA_CC, ccs);   
  6. it.putExtra(Intent.EXTRA_TEXT, "The email body text");   
  7. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");   
  8. it.setType("message/rfc822");   
  9. startActivity(Intent.createChooser(it, "Choose Email Client")); 
 
添加附件 
  1. Intent it = new Intent(Intent.ACTION_SEND); 
  2. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text"); 
  3. it.putExtra(Intent.EXTRA_STREAM, "[url=]file:///sdcard/mysong.mp3[/url]"); 
  4. sendIntent.setType("audio/mp3"); 
  5. startActivity(Intent.createChooser(it, "Choose Email Client")); 
 
播放多媒体 
  1.   
  2. Intent it = new Intent(Intent.ACTION_VIEW); 
  3. Uri uri = Uri.parse("[url=]file:///sdcard/song.mp3[/url]"); 
  4. it.setDataAndType(uri, "audio/mp3"); 
  5. startActivity(it); 
  1. Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1"); 
  2. Intent it = new Intent(Intent.ACTION_VIEW, uri); 
  3. startActivity(it);   
 
Uninstall 程序 
  1. Uri uri = Uri.fromParts("package", strPackageName, null); 
  2. Intent it = new Intent(Intent.ACTION_DELETE, uri); 
  3. startActivity(it); 
 
//调用相册 
public static final String MIME_TYPE_IMAGE_JPEG = "image/*"; 
public static final int ACTIVITY_GET_IMAGE = 0; 
Intent getImage = new Intent(Intent.ACTION_GET_CONTENT); 
getImage.addCategory(Intent.CATEGORY_OPENABLE); 
getImage.setType(MIME_TYPE_IMAGE_JPEG); 
startActivityForResult(getImage, ACTIVITY_GET_IMAGE); 
 
//调用系统相机应用程序，并存储拍下来的照片 
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
time = Calendar.getInstance().getTimeInMillis(); 
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment 
.getExternalStorageDirectory().getAbsolutePath()+"/tucue", time + ".jpg"))); 
startActivityForResult(intent, ACTIVITY_GET_CAMERA_IMAGE); 
 
uninstall apk 
/**未测试 
Uri uninstallUri = Uri.fromParts("package", "xxx", null); 
returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri); 
*/ 
Uri packageURI = Uri.parse("package:"+wistatmap);   
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);   
startActivity(uninstallIntent); 
 
install apk 
Uri installUri = Uri.fromParts("package", "xxx", null); 
returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri); 
play audio 
Uri playUri = Uri.parse("[url=]file:///sdcard/download/everything.mp3[/url]"); 
returnIt = new Intent(Intent.ACTION_VIEW, playUri); 
 
//发送附件 
Intent it = new Intent(Intent.ACTION_SEND);   
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");   
it.putExtra(Intent.EXTRA_STREAM, "[url=]file:///sdcard/eoe.mp3[/url]");   
sendIntent.setType("audio/mp3");   
startActivity(Intent.createChooser(it, "Choose Email Client")); 
 
//搜索应用 
Uri uri = Uri.parse("market://search?q=pname:pkg_name");   
Intent it = new Intent(Intent.ACTION_VIEW, uri);   
startActivity(it);   
//where pkg_name is the full package path for an application 
 
//进入联系人页面 
Intent intent = new Intent(); 
intent.setAction(Intent.ACTION_VIEW); 
intent.setData(People.CONTENT_URI); 
startActivity(intent); 
 
//查看指定联系人 
Uri personUri = ContentUris.withAppendedId(People.CONTENT_URI, info.id);//info.id联系人ID 
Intent intent = new Intent(); 
intent.setAction(Intent.ACTION_VIEW); 
intent.setData(personUri);
 
startActivity(intent);