在我的应用程序中，我有两个大小相同且工作正常的 imageView。但是，当我将图片放入每个 imageView 中，然后尝试用不同的图片切换顶部的 imageView 时，底部的 imageView 最终会得到应该放在顶部 imageView 中的图片。我不确定这是为什么。这是我的xml文件：
<?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="30sp"
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:adjustViewBounds="true"
android:maxWidth="100dp"
android:maxHeight="100dp"
android:scaleType="fitCenter"
android:contentDescription="@string/descForBackground"
/>
<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:adjustViewBounds="true"
android:maxWidth="100dp"
android:maxHeight="100dp"
android:scaleType="fitCenter"
android:contentDescription="@string/descForIcon"
/>
<Button
android:id="@+id/btnChangeImageForIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/change_icon" />
</LinearLayout>
然后这是我的java编码：
package com.example.awesomefilebuilderwidget;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.Context;
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;
Button btnChangeImageForIcon;
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 = getContentResolver().query(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
image.setImageBitmap(bMap);
if (fileis != null)
{
fileis.close();
}
if (bufferedstream != null)
{
bufferedstream.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
image = (ImageView) findViewById(R.id.imageView2Icon);
btnChangeImageForIcon = (Button) findViewById(R.id.btnChangeImageForIcon);
btnChangeImageForIcon.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 boolean saveImageToInternalStorage(Bitmap image) {
try {
FileOutputStream fos = this.openFileOutput("desiredFilename.png", Context.MODE_PRIVATE);
image.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
return true;
} catch (Exception e) {
return false;
}
}
}
我正在使用的更新代码：
package com.example.awesomefilebuilderwidget;
IMPORTS
public class Personalize extends Activity implements OnClickListener {
Button button;
ImageView image;
ImageView image2;
Button btnChangeImage;
Button btnChangeImageForIcon;
private static final int SELECT_PICTURE = 1;
private static final int SELECT_PICTURE_2 = 2;
private String selectedImagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.personalize);
Button btnChangeImage = (Button) findViewById(R.id.btnChangeImage);
btnChangeImage.setOnClickListener(this);
Button btnChangeImageForIcon = (Button) findViewById(R.id.btnChangeImageForIcon);
btnChangeImageForIcon.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// 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 = getContentResolver().query(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);
Bitmap b1 = getAndDecodeImage(selectedImagePath);
if(b1 != null){
image.setImageBitmap(b1);
}
} else if (requestCode == SELECT_PICTURE_2)
{
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
Bitmap b2 = getAndDecodeImage(selectedImagePath);
if(b2 != null){
image2.setImageBitmap(b2);
}
}
}
}
private Bitmap getAndDecodeImage(String selectedImagePath){
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
return bMap;
if (fileis != null)
{
fileis.close();
}
if (bufferedstream != null)
{
bufferedstream.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public boolean saveImageToInternalStorage(Bitmap image) {
try {
FileOutputStream fos = this.openFileOutput("desiredFilename.png", Context.MODE_PRIVATE);
image.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
return true;
} catch (Exception e) {
return false;
}
}
}