我有一个列表视图和一个按钮。单击按钮时,它会导致用户可以选择图片的图库。当我测试我的应用程序并转到图库时,当我选择一张图片时,imageview 不会使用该图片更新。这是我的图像视图和按钮:
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/btnChangeImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/change_background" />
还有我的编码:
package com.example.awesomefilebuilderwidget;
IMPORTS
public class Personalize extends Activity{
Button button;
ImageView image;
Button btnChangeImage;
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.personalize);
addListenerOnButton();
}
public void addListenerOnButton() {
image = (ImageView) findViewById(R.id.imageView1);
image = (ImageView) findViewById(R.id.imageView2Icon);
btnChangeImage = (Button) findViewById(R.id.btnChangeImage);
btnChangeImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, SELECT_PICTURE);
}
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE)
{
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
try {
FileInputStream fileis=new FileInputStream(selectedImagePath);
BufferedInputStream bufferedstream=new BufferedInputStream(fileis);
byte[] bMapArray= new byte[bufferedstream.available()];
bufferedstream.read(bMapArray);
Bitmap bMap = BitmapFactory.decodeByteArray(bMapArray, 0, bMapArray.length);
//Here you can set this /Bitmap image to the button background image
if (fileis != null)
{
fileis.close();
}
if (bufferedstream != null)
{
bufferedstream.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public 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);
}
});
}
}
添加:xml的完整代码:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/personalizetextView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/customize"
android:textSize="30dip"
android:gravity="center"
android:layout_marginTop="20dip"/>
<TextView
android:id="@+id/personalizetextviewChangeBackground"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/customizebackground"
android:gravity="center" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/pattern1"
/>
<Button
android:id="@+id/btnChangeImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/change_background" />
<TextView
android:id="@+id/personalizetextviewChangeIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/change_icon"
android:gravity="center" />
<ImageView
android:id="@+id/imageView2Icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/pattern2" />
<Button
android:id="@+id/btnChangeImageForIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/change_icon" />
</LinearLayout>
Personalize.java 的完整代码:
package com.example.awesomefilebuilderwidget;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class Personalize extends Activity{
Button button;
ImageView image;
ImageView image2;
Button btnChangeImage;
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.personalize);
addListenerOnButton();
}
public void addListenerOnButton() {
image = (ImageView) findViewById(R.id.imageView1);
btnChangeImage = (Button) findViewById(R.id.btnChangeImage);
btnChangeImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, SELECT_PICTURE);
}
});
}
public 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);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE)
{
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
try {
FileInputStream fileis=new FileInputStream(selectedImagePath);
BufferedInputStream bufferedstream=new BufferedInputStream(fileis);
byte[] bMapArray= new byte[bufferedstream.available()];
bufferedstream.read(bMapArray);
Bitmap bMap = BitmapFactory.decodeByteArray(bMapArray, 0, bMapArray.length);
//Here you can set this /Bitmap image to the button background image
if (fileis != null)
{
fileis.close();
}
if (bufferedstream != null)
{
bufferedstream.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
我将添加其他编码来更新图标,因为我可以继承相同的编码并根据需要修改资源的名称