Android调用系统相机和相册

Posted 2020-07-06

准备工作

 

权限

<!-- 往SDCard写入数据权限 --> 
<uses-permission android:name="android.permission.
WRITE_EXTERNAL_STORAGE" /> 
<!--请求访问使用照相设备-->
<uses-permission android:name="android.permission.CAMERA" />

常量

public final static int ALBUM_REQUEST_CODE = 1;
public final static int CROP_REQUEST = 2;
public final static int CAMERA_REQUEST_CODE = 3;
// 拍照路径
public static String SAVED_IMAGE_DIR_PATH = 
Environment.getExternalStorageDirectory().getPath() 
+ "/AppName/camera/";
String cameraPath;

相机

    // 指定相机拍摄照片保存地址
    String state = Environment.getExternalStorageState();
    if (state.equals(Environment.MEDIA_MOUNTED)) {
    cameraPath = SAVED_IMAGE_DIR_PATH + 
   System.currentTimeMillis() + ".png";
    Intent intent = new Intent();    
    // 指定开启系统相机的Action
    intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
    String out_file_path = SAVED_IMAGE_DIR_PATH;
    File dir = new File(out_file_path);    if (!dir.exists()) {
        dir.mkdirs();
    } 
    // 把文件地址转换成Uri格式
    Uri uri = Uri.fromFile(new File(cameraPath));    
    // 设置系统相机拍摄照片完成后图片文件的存放地址
    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
    startActivityForResult(intent, CAMERA_REQUEST_CODE);
} else {
    Toast.makeText(getApplicationContext(), "请确认已经插入SD卡",
            Toast.LENGTH_LONG).show();
}

 

onActivityResult

拿到cameraPath，就随便你搞了。

@Override

public void onActivityResult(int requestCode, 
int resultCode, Intent data) {    
super.onActivityResult(requestCode, resultCode, data);    
if (resultCode == Activity.RESULT_OK) {        
if (requestCode == CAMERA_REQUEST_CODE) {
            LogUtil.d("path=" + cameraPath);
        }
 }

相册

Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, ALBUM_REQUEST_CODE);

onActivityResult

调用系统相册，然后通过Uri拿到图片的绝对地址。

 @Override
 public void onActivityResult(int requestCode,
    int resultCode, Intent data) {      
 super.onActivityResult(requestCode, resultCode, data);    
 if (resultCode == Activity.RESULT_OK) {           
 if (requestCode == AppConstants.ALBUM_REQUEST_CODE) {               
 try {
       
 Uri uri = data.getData();                    
 final String absolutePath= 
 getAbsolutePath(mActivity, uri);
     
 ogUtil.d("path=" + absolutePath);
       
          } catch (Exception e) {
                    e.printStackTrace();
           
          }
            }

        }
    }

 

getAbsolutePath方法

 public String getAbsolutePath(final Context context, 
            final Uri uri) {
      if (null == uri) return null;
           final String scheme = uri.getScheme();
     String data = null;
            if (scheme == null)
         data = uri.getPath();
            else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
         data = uri.getPath();
     } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
         Cursor cursor = context.getContentResolver().query(uri, 
         new String[]{MediaStore.Images.ImageColumns.DATA},
             null, null, null);
          if (null != cursor) {             
             if (cursor.moveToFirst()) {                 
              int index = cursor.getColumnIndex(
              MediaStore.Images.ImageColumns.DATA);                 
               if (index > -1) {
               data = cursor.getString(index);
                 }
             }
             cursor.close();
         }
     }     return data;
 }