Question

问候，

我正在尝试在Android设备上上传图片。

我有以下代码导致图像选择器出现并检查SD卡（这就是我想要的）。

Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, 1);

但接下来我该怎么办？是否有一些我可以覆盖的类来处理被点击的图像？我试过谷歌搜索但找不到任何东西。我希望有人能指出我正确的方向。

尝试了willytate的建议，但现在我不断收到以下错误：

02-08 16:58:01.574: ERROR/AndroidRuntime(16962): FATAL EXCEPTION: WebViewCoreThread
02-08 16:58:01.574: ERROR/AndroidRuntime(16962): java.lang.NullPointerException
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.app.Activity.startActivityForResult(Activity.java:2890)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at prestocab.driver.Main$Uploader.upload(Main.java:172)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.webkit.WebViewCore.nativeTouchUp(Native Method)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.webkit.WebViewCore.access$3300(WebViewCore.java:66)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1226)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.os.Looper.loop(Looper.java:143)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:642)
02-08 16:58:01.574: ERROR/AndroidRuntime(16962):     at java.lang.Thread.run(Thread.java:1102)

这是我的班级：

public class Uploader extends Activity{   //uploader
        @Override
        protected void onCreate(Bundle savedInstanceState){
            super.onCreate(savedInstanceState);
        }
        public void upload(){
            Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent,0);

        }
        @Override
        public void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (resultCode == RESULT_OK) {
                Uri selectedImageUri = data.getData();
                String selectedImagePath = data.getDataString();
                Toast.makeText(Main.this, selectedImagePath, 2000);
            }
        }
    }

非常感谢，

Answer 1

Eamorr，

您需要在onActivityResult()中捕获返回的图像。您将检查requestCode值以确保它是您想要返回的意图。在你的情况下你放了一个1。然后处理图像上传...就像这样：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        switch(requestCode) {
        case 1:
            imageUri = data.getData();  //get the Uri of the image from the returned data
            //upload imageUri
            break;
        }
    }
}

编辑： Eamorr。

使用此函数获取data.getDataString()的ImagePath字符串。只需传入imageUri。

public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    startManagingCursor(cursor);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

我实际上在我的应用程序中具有相同的功能，所以我遇到了所有这些障碍＆gt;＆lt;

Android上传图片

1 个答案: