Android中通过Intent 调用图片、视频、音频、录音、拍照

１.　android中的一个隐藏的类:ContentType,其中定义了android支持的mimetype类型

　　类的路径:　com.google.android.mms.ContentType

２.　Action为Intent.ACTION_GET_CONTENT的Intent可以设置许多参数,如:

　　intent.putExtra("crop", "true");
intent.putExtra("outputX", appsWallpaperWidth);
intent.putExtra("outputY", apps_wallpaper_height);
intent.putExtra("aspectX", appsWallpaperWidth);
intent.putExtra("aspectY", apps_wallpaper_height);
intent.putExtra("scale", true);
intent.putExtra("noFaceDetection", true);
intent.putExtra("output", appsWallpaperPath);
intent.putExtra("outputFormat", "JPEG");

３.　使用startActivityForResult方法启动Intent对应的Activity,可以在原Activity的回调方法onActivityResult方法中拿到返回的数据.返回的数据放在第三个参数data(Intnet类型)中.

　　使用getData返回一个Uri,再使用context.getContentResolver().openInputStream(uri);可以拿到一个输入流.

　　

//选择图片 requestCode 返回的标识

Intent intent = new Intent(Intent.ACTION_GET_CONTENT); //"android.intent.action.GET_CONTENT"

intent.setType(contentType); //查看类型 String IMAGE_UNSPECIFIED = "image/*";

Intent wrapperIntent = Intent.createChooser(intent, null);

((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//添加音频

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";

Intent wrapperIntent = Intent.createChooser(intent, null);

((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//拍摄视频

int durationLimit = getVideoCaptureDurationLimit(); //SystemProperties.getInt("ro.media.enc.lprof.duration", 60);

Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);

intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, sizeLimit);

intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, durationLimit);

startActivityForResult(intent, REQUEST_CODE_TAKE_VIDEO);

//视频

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";

Intent wrapperIntent = Intent.createChooser(intent, null);

((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//录音

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.setType(ContentType.AUDIO_AMR); //String AUDIO_AMR = "audio/amr";

intent.setClassName("com.android.soundrecorder",

"com.android.soundrecorder.SoundRecorder");

((Activity) context).startActivityForResult(intent, requestCode);

//拍照 REQUEST_CODE_TAKE_PICTURE 为返回的标识

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //"android.media.action.IMAGE_CAPTURE";

intent.putExtra(MediaStore.EXTRA_OUTPUT, Mms.ScrapSpace.CONTENT_URI); // output,Uri.parse("content://mms/scrapSpace");

startActivityForResult(intent, REQUEST_CODE_TAKE_PICTURE);

参考:

http://www.cnblogs.com/top5/archive/2012/05/04/2482235.html