这是相机代码
private void selectImage(){
final int Camera_CPTURE = 1;
try {
Intent capture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(capture,Camera_CPTURE);
}catch (ActivityNotFoundException e)
{
String error ="opps ur devices doesn't support capturing";
Toast toast = Toast.makeText(this,error,Toast.LENGTH_SHORT);
toast.show();
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
picUri = data.getData();
performCrop(); }
else if(requestCode == PIC_CROP)
{
Bundle extra = data.getExtras();
Bitmap thePic = extra.getParcelable("data");
ImageView picView = (ImageView)findViewById(R.id.imageView);
picView.setImageBitmap(thePic);
}
}
private void performCrop() {
try {
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(picUri,"image/*");
cropIntent.putExtra("crop","true");
cropIntent.putExtra("aspectX",1);
cropIntent.putExtra("aspectY",1);
cropIntent.putExtra("outputX",200);
cropIntent.putExtra("outputY",200);
cropIntent.putExtra("return-data",true);
startActivityForResult(cropIntent,PIC_CROP);
}catch (ActivityNotFoundException e)
{
String error ="opps ur devices doesn't support capturing";
Toast toast = Toast.makeText(this,error,Toast.LENGTH_SHORT);
toast.show();
}
}
@Override
public void onClick(View view) {
if(view.getId()==R.id.button){
selectImage();
}
}
}
并且日志在这里
[java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2,
result=0, data=null} to activity
{com.gurucharan.studentdatabase/com.gurucharan.studentdatabase.MyActivity}:
java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3007)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3050)
at android.app.ActivityThread.access$1100(ActivityThread.java:127)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1188)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4448)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.gurucharan.studentdatabase.MyActivity.onActivityResult(MyActivity.java:61)
at android.app.Activity.dispatchActivityResult(Activity.java:4649)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3003)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3050)
at android.app.ActivityThread.access$1100(ActivityThread.java:127)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1188)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4448)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
at dalvik.system.NativeStart.main(Native Method)
08-29 14:40:13.503 1819-2133/? E/JavaBinder﹕ !!! FAILED BINDER TRANSACTION !!!
08-29 14:40:13.503 1819-2133/? E/JavaBinder﹕ !!! FAILED BINDER TRANSACTION !!!
08-29 14:40:13.503 2053-2053/? E/JavaBinder﹕ !!! FAILED BINDER TRANSACTION !!!
08-29 14:40:14.274 10409-10409/? E/wpa_supplicant﹕ RX ctrl_iface - hexdump_ascii(len=11)]
答案 0 :(得分：5)
如果您在Kotlin上遇到错误，只需将数据意图标记为 @nullable 即可添加？在Intent类型声明之后。所以看起来应该是这样的：
data: Intent?.
答案 1 :(得分：2)
if(requestCode==Camera_CPTURE && resultCode=RESULT_OK && data!=null)
{
}
答案 2 :(得分：1)
我希望这段代码有用..
private String selectedImagePath = "";
final private int PICK_IMAGE = 1;
final private int CAPTURE_IMAGE = 2;
private String imgPath;
private void selectImage() {
AlertDialog.Builder builder = new AlertDialog.Builder(
ProfileActivity.this);
// builder.setTitle("Choose Image Source");
builder.setItems(new CharSequence[] { "Take a Photo",
"Choose from Gallery" },
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
Intent intent1 = new Intent(
MediaStore.ACTION_IMAGE_CAPTURE);
intent1.putExtra(MediaStore.EXTRA_OUTPUT,
setImageUri());
startActivityForResult(intent1, CAPTURE_IMAGE);
break;
case 1:
// GET IMAGE FROM THE GALLERY
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(intent, ""),
PICK_IMAGE);
break;
default:
break;
}
}
});
builder.show();
}
public Uri setImageUri() {
File file = new File(Environment.getExternalStorageDirectory(), "image" + new Date().getTime() + ".png");
Uri imgUri = Uri.fromFile(file);
this.imgPath = file.getAbsolutePath();
return imgUri;
}
public String getImagePath() {
return imgPath;
}
onActivityForResultSetMethod
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != Activity.RESULT_CANCELED) {
if (requestCode == PICK_IMAGE) {
selectedImagePath = getAbsolutePath(data.getData());
System.out.println("path" + selectedImagePath);
imageView.setImageBitmap(decodeFile(selectedImagePath));
} else if (requestCode == CAPTURE_IMAGE) {
selectedImagePath = getImagePath();
System.out.println("path" + selectedImagePath);
imageView.setImageBitmap(decodeFile(selectedImagePath));
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
public Bitmap decodeFile(String path) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 70;
// Find the correct scale value. It should be the power of
// 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE
&& o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeFile(path, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
public String getAbsolutePath(Uri uri) {
String[] projection = { MediaColumns.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaColumns.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} else
return null;
}