Question

我有一个列表视图和一个按钮。单击该按钮后，它将指向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，当我选择图片时，图片视图不会更新该图片。这是我的imageview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" />

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);
            }

    });


    } 
}

增加： 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，因为我可以根据需要进行相同的编码并修改资源名称

Answer 1

看起来onActivityResult()和getPath()都在OnClickListener内。尝试将它们移出来作为Personalize的方法。您还需要将@Override添加到onActivityResult()。

Answer 2

我没有看到您使用所选的＆＃34;图片＆＃34;设置ImageView的行。

这一行之后：

位图bMap = BitmapFactory.decodeByteArray（bMapArray，0，bMapArray.length）;

添加：

image.setImageBitmap（BMAP）;

Answer 3

尝试设置如下图像：

     Uri selectedImageUri = data.getData();
     selectedImagePath = getPath(selectedImageUri);
     Bitmap bmp = BitmapFactory.decodeFile(selectedImagePath);
     image.setImageBitmap(bmp);

而不是：

        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();
        }

如果这不能解决问题，请告诉我。

来自Gallery的图像未设置为imageview

3 个答案: