Question

@Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode != Activity.RESULT_CANCELED) {
      if (requestCode == PICK_IMAGE) {
        Uri selectedImageUri = data.getData();
        Log.d("PICK_IMAGE", selectedImageUri.toString());
        Dialog settingsDialog = new Dialog(this);
        settingsDialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        settingsDialog.setContentView(getLayoutInflater().inflate(R.layout.custom_dailogue, null));
        img_in_dailogue = (ImageView) findViewById(R.id.img_in_dailogue);
        ImageView img_in_dailogue = new ImageView(this);
        LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
        img_in_dailogue.setLayoutParams(vp);
        img_in_dailogue.setMaxHeight(250);
        img_in_dailogue.setMaxWidth(350);
        img_in_dailogue.setImageURI(Uri.parse(selectedImageUri.toString()));
        settingsDialog.show();
      }
    }
  }

Logcat错误

java.lang.RuntimeException：传递结果失败ResultInfo {who = null，request = 0，result = -1，data = Intent {dat = content：// media / external / images / media / 232 flg = 0x1} } to activity {com.leadconcept.whopopsup / com.leadconcept.whopopsup.CameraActivity}：java.lang.NullPointerException

at com.leadconcept.whopopsup.CameraActivity.onActivityResult（CameraActivity.java:131）

第二个logcat错误将我带到这行代码：

img_in_dailogue.setImageURI(Uri.parse(selectedImageUri.toString()));

该代码有什么问题？我无法理解为什么我不能将imageUri发送到imageview。我还验证了我传递给setImageURI函数的Uri值是正确的。

Answer 1

img_in_dailogue = (ImageView) findViewById(R.id.img_in_dailogue);
ImageView img_in_dailogue = new ImageView(this);

在初始化之前，你不是在使用img_in_dailogue（它是“对话”btw，而不是dailogue）吗？不应该是：

ImageView img_in_dailogue = new ImageView(this);
img_in_dailogue = (ImageView) findViewById(R.id.img_in_dailogue);

HTH。

无法将图像设置为Android中图像库的imageview

1 个答案: