如何设置从SD卡中选择图像在Android中的ImageView [英] How to set selected image from SD card on imageview in Android
问题描述
我是Android开发的初学者。我想开发自己的画廊。但我面临的一个问题。当我去到SD卡在我的记忆和选择照片,然后我试图用我的图片浏览器应用打开图像。但是,当我选择图像查看器,然后另一个意图要求选择我的形象。但是,我想直接显示在的ImageView
选定的图像。请人帮我。
我的code:
公共类MainActivity延伸活动{ 私有静态最终诠释REQUEST_ code = 1;
私人位图位图;
私人ImageView的ImageView的;
私人字符串selectedImagePath;
@覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
ImageView的=(ImageView的)findViewById(R.id.result);
pickImage();
} 公共无效pickImage(){
意向意图=新的Intent();
intent.setType(图像/ *);
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(意向,REQUEST_ code);
} @覆盖
保护无效的onActivityResult(INT申请code,INT结果code,意图数据){
InputStream的流= NULL;
如果(要求code == REQUEST_ code和;&安培;结果code == Activity.RESULT_OK)
尝试{
// recyle未使用的位图 乌里selectedImage = data.getData(); 的String [] = filePathColumn {MediaStore.Images.Media.DATA};
光标光标= getContentResolver()查询(selectedImage,filePathColumn,NULL,NULL,NULL);
cursor.moveToFirst();
INT参数:columnIndex = cursor.getColumnIndex(filePathColumn [0]);
字符串文件路径= cursor.getString(参数:columnIndex); Log.v(罗尼,文件路径);
cursor.close(); 如果(位图= NULL&放大器;!&安培;!bitmap.isRecycled())
{
位= NULL;
} 位= BitmapFactory.de codeFILE(文件路径);
imageView.setBackgroundResource(0);
imageView.setImageBitmap(位图);
// imageView.setImageBitmap(位图);
}赶上(例外五){
e.printStackTrace();
} {最后
如果(流!= NULL)
尝试{
stream.close();
}赶上(IOException异常五){
e.printStackTrace();
}
}
}
私人字符串的getPath(URI URI)
{
的String [] =投影{MediaStore.Images.Media.DATA};
光标光标= managedQuery(URI,投影,NULL,NULL,NULL);
INT与Column_Index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
返回cursor.getString(Column_Index中);
}
}
/////后改变code
公共类MainActivity延伸活动{ 私有静态最终诠释REQUEST_ code = 1;
私人位图位图;
私人ImageView的ImageView的;
私人字符串selectedImagePath;
@覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
ImageView的=(ImageView的)findViewById(R.id.result); 意图I =新意图(
Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(I,REQUEST_ code);
} @覆盖
保护无效的onActivityResult(INT申请code,INT结果code,意图数据){
InputStream的流= NULL;
如果(要求code == REQUEST_ code和;&安培;结果code == Activity.RESULT_OK)
尝试{
// recyle未使用的位图 乌里selectedImage = data.getData(); 的String [] = filePathColumn {MediaStore.Images.Media.DATA};
光标光标= getContentResolver()查询(selectedImage,filePathColumn,NULL,NULL,NULL);
cursor.moveToFirst();
INT参数:columnIndex = cursor.getColumnIndex(filePathColumn [0]);
字符串文件路径= cursor.getString(参数:columnIndex); Log.v(罗尼,文件路径);
cursor.close(); 如果(位图= NULL&放大器;!&安培;!bitmap.isRecycled())
{
位= NULL;
} 位= BitmapFactory.de codeFILE(文件路径);
//imageView.setBackgroundResource(0);
imageView.setImageBitmap(位图);
// imageView.setImageBitmap(位图);
}赶上(例外五){
e.printStackTrace();
} {最后
如果(流!= NULL)
尝试{
stream.close();
}赶上(IOException异常五){
e.printStackTrace();
}
}
}
私人字符串的getPath(URI URI)
{
的String [] =投影{MediaStore.Images.Media.DATA};
光标光标= managedQuery(URI,投影,NULL,NULL,NULL);
INT与Column_Index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
返回cursor.getString(Column_Index中); }}
让我们假设你有一个名为活性 ViewActivity
这显示选定的图像。
在的AndroidManifest.xml
通过添加此设置你的活动作为一个图像浏览器活动:
<活动机器人:名字=。ViewActivity>
&所述;意图滤光器>
<作用机器人:名字=android.intent.action.VIEW/>
<类机器人:名字=android.intent.category.DEFAULT/>
<数据机器人:mime类型=图像/ */>
&所述; /意图滤光器>
< /活性GT;
在的onCreate()
做这个 ViewActivity
捕获图像传递方法:
意向意图= getIntent();
乌里数据= intent.getData();
//检查如果数据类型是图片
如果(intent.getType()的indexOf(图像/)!= -1)
{
myImageView.setImageURI(数据);
}
I am a beginner of android development. I am trying to develop my own gallery. But I am facing a problem. When I go to SD card on my memory and choose a photo then I am trying to open image using my Image Viewer app. But when I select Image Viewer then another intent is called for choosing my image. But I directly want show the selected image on Imageview
. Please anyone help me.
My code:
public class MainActivity extends Activity {
private static final int REQUEST_CODE = 1;
private Bitmap bitmap;
private ImageView imageView;
private String selectedImagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.result);
pickImage();
}
public void pickImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
InputStream stream = null;
if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK)
try {
// recyle unused bitmaps
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
Log.v("roni", filePath);
cursor.close();
if(bitmap != null && !bitmap.isRecycled())
{
bitmap = null;
}
bitmap = BitmapFactory.decodeFile(filePath);
imageView.setBackgroundResource(0);
imageView.setImageBitmap(bitmap);
// imageView.setImageBitmap(bitmap);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stream != null)
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private String getPath(Uri uri)
{
String[] projection={MediaStore.Images.Media.DATA};
Cursor cursor=managedQuery(uri,projection,null,null,null);
int column_index=cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
/////After changing the code
public class MainActivity extends Activity {
private static final int REQUEST_CODE = 1;
private Bitmap bitmap;
private ImageView imageView;
private String selectedImagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.result);
Intent i = new Intent(
Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
InputStream stream = null;
if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK)
try {
// recyle unused bitmaps
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
Log.v("roni", filePath);
cursor.close();
if(bitmap != null && !bitmap.isRecycled())
{
bitmap = null;
}
bitmap = BitmapFactory.decodeFile(filePath);
//imageView.setBackgroundResource(0);
imageView.setImageBitmap(bitmap);
// imageView.setImageBitmap(bitmap);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stream != null)
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private String getPath(Uri uri)
{
String[] projection={MediaStore.Images.Media.DATA};
Cursor cursor=managedQuery(uri,projection,null,null,null);
int column_index=cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index); } }
Let's assume you have an activity called ViewActivity
that shows selected Image.
in your AndroidManifest.xml
set your activity as a Image Viewer Activity by adding this :
<activity android:name=".ViewActivity">
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="image/*"/>
</intent-filter>
</activity>
in onCreate()
method of ViewActivity
catch passed Image by doing this :
Intent intent = getIntent();
Uri data = intent.getData();
//Check If data type is Image
if (intent.getType().indexOf("image/") != -1)
{
myImageView.setImageURI(data);
}
这篇关于如何设置从SD卡中选择图像在Android中的ImageView的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!