未能加载来自Uri的图像第三项活动
问题描述:
我是Android Studio的新手。我的应用程序允许我添加用户(fn,ln,adrs,Uri :: ImageUri)并列出它们并查看它们的信息。 我希望能够显示一个用户的信息,当点击我的列表视图。未能加载来自Uri的图像第三项活动
问题是,我只得到一个空白空间,而不是我想要的imageview。
我的主要活动:
公共类MainActivity延伸AppCompatActivity {
public static ArrayList <User> users =new ArrayList <User>();
public static User userSelected;
public static ListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(activity_main);
mListView = (ListView) findViewById(R.id.List);
}
public void InputInfo(View view) {
Intent AddEmployee = new Intent(this, NewEmployeeInfo.class);
startActivityForResult(AddEmployee,0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(0, resultCode, data);
finaltest =NewEmployeeInfo .targetUri ;
UserAdapter useradapter;
useradapter = new UserAdapter (MainActivity .this, android.R.layout.simple_list_item_1, users ) ;
mListView.setAdapter(useradapter);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> adapter, View view, int position, long arg) {
Intent appInfo = new Intent(MainActivity.this, DisplayInfo.class);
User temp= users.get(position);
userSelected =new User(temp.first_name ,temp.last_name,temp.adr,temp.url );
startActivity(appInfo);
}
});
}
}
我的第二个(其中,用户输入信息:
public class NewEmployeeInfo extends AppCompatActivity {
public ImageView imageview;
public ImageView targetImage;
public User u;
public static Bitmap photo;
public static Uri targetUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new_employee_info);
}
public void takePhoto(View view) {
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePicture, 0);
}
public void pickphoto(View view) {
Intent pickPhoto = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(pickPhoto, 1);
}
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
imageview = (ImageView) this.findViewById(imageView);
resultphoto(requestCode, resultCode, imageReturnedIntent);
}
public void Save(View view) {
Intent SaveDataIntent = new Intent(this, MainActivity.class);
EditText FN = (EditText) findViewById(R.id.editText);
EditText LN = (EditText) findViewById(R.id.editText5);
EditText ADDRESS = (EditText) findViewById(R.id.editText6);
String firstname = FN.getText().toString();
String lastname = LN.getText().toString();
String address = ADDRESS.getText().toString();
if (firstname.length() == 0 || lastname.length() == 0 || address.length() == 0) {
Toast.makeText(this, "No Emty Fields!!",
Toast.LENGTH_LONG).show();
return;
}
u = new User(firstname, lastname, address, targetUri);
users.add(u);
setResult(RESULT_OK, SaveDataIntent);
finish();
}
private void resultphoto(int requestCode, int resultCode, Intent imageReturnedIntent) {
switch (requestCode) {
case 0:
if (resultCode == RESULT_OK) {
targetUri = imageReturnedIntent.getData();
imageview.setImageURI(targetUri);
imageReturnedIntent.getExtras().get("data");
}
break;
case 1:
if (resultCode == RESULT_OK) {
targetUri = imageReturnedIntent.getData();
targetImage = (ImageView) findViewById(imageView);
try {
photo = BitmapFactory.decodeStream(getContentResolver().openInputStream(targetUri));
targetImage.setImageBitmap(photo);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
break;
}
}
}
第三和最后一个(应显示信息的地方)
public class DisplayInfo extends AppCompatActivity {
public ImageView imageView;
public Bitmap image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_info);
TextView fn = (TextView) findViewById(R.id.firstname);
TextView ln = (TextView) findViewById(R.id.lastname);
TextView adr = (TextView) findViewById(R.id.address);
imageView = (ImageView) findViewById(R.id.imageView2);
fn.setText(MainActivity.userSelected.first_name);
ln.setText(MainActivity.userSelected.last_name);
adr.setText(MainActivity.userSelected.adr);
imageView.setImageURI(MainActivity.userSelected.url ) ;
此错误不断显示出来
E/DatabaseUtils:写入例外包裹 java.lang.SecurityException异常:权限拒绝:阅读com.android.providers.media.MediaProvider URI内容:/ /媒体/外部/图像/媒体从PID/810 = 12644,UID = 10280要求android.permission.READ_EXTERNAL_STORAGE,或grantUriPermission()
虽然我包括在我清单文件这些权限:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
答
我的问题是在清单文件;
这是
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".NewEmployeeInfo">
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity android:name=".DisplayInfo" />
<activity android:name=".UserAdapterActivity"></activity>
<uses-permission
android:name="android.permission.READ_EXTERNAL_STORAGE"
/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</application>
我忘记了我的权限。它应该一直这样
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mobilonia.employeesapp">
<uses-permission
android:name="android.permission.READ_EXTERNAL_STORAGE"
/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".NewEmployeeInfo">
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity android:name=".DisplayInfo" />
<activity android:name=".UserAdapterActivity"></activity>
</application>
</manifest>
我们展示了整个清单XML – m0skit0
我想你需要运行的权限,但不完全清单 –
分不清哪个设备上,你运行应用程序?我的意思是哪个api是dut。 –