系统已经有的东西,如果我们没有新的需求的话,直接调用是最直接的。下面讲讲调用系统相机拍照并保存图片和如何调用系统相册的方法。
首先看看调用系统相机的核心方法:
相机返回的数据通过下面的回调方法取得,并处理:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA && resultCode == Activity.RESULT_OK && null != data){
String sdState=Environment.getExternalStorageState();
if(!sdState.equals(Environment.MEDIA_MOUNTED)){
GameLog.log(Tag, "sd card unmount");
return;
}
new DateFormat();
String name= DateFormat.format("yyyyMMdd_hhmmss", Calendar.getInstance(Locale.CHINA))+".jpg";
Bundle bundle = data.getExtras();
//获取相机返回的数据,并转换为图片格式
Bitmap bitmap = (Bitmap)bundle.get("data");
FileOutputStream fout = null;
File file = new File("/sdcard/pintu/");
file.mkdirs();
String filename=file.getPath()+name;
try {
fout = new FileOutputStream(filename);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fout);
} catch (FileNotFoundException e) {
e.printStackTrace();
}finally{
try {
fout.flush();
fout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//显示图片
}
}
下面是调用系统相册并取得照片的方法:
-
Intent picture = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
-
startActivityForResult(picture, PICTURE);
下面是相应的回调方法:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA && resultCode == Activity.RESULT_OK && null != data){
Uri selectedImage = data.getData();
String[] filePathColumns={MediaStore.Images.Media.DATA};
Cursor c = this.getContentResolver().query(selectedImage, filePathColumns, null,null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePathColumns[0]);
String picturePath= c.getString(columnIndex);
c.close();
//获取图片并显示
}
这样就完成了系统调用,很简单。