Question

我是android的新手，现在我还在构建一个包含两个活动的应用程序首先是LoginPage，它运行良好，第二个是UserPage问题从这里开始。我在UserPage上创建了两个ImageView，我想要的是

点击ImageView
从相机拍摄照片
将其保存到选定的ImageView

当我单击第一个ImageView并从相机保存图片时效果很好，当我点击第二个图像视图时出现问题，当我拍照并将其保存到第二个图像视图时，第一个图像视图中的图片消失了

这是我的代码： user.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >


<ImageView
    android:id="@+id/image1"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:scaleType="centerInside" />


<ImageView
    android:id="@+id/image2"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_toRightOf="@id/image1"
    android:layout_alignTop="@id/image1"
    android:scaleType="centerInside" />

</RelativeLayout>

UserPage.java

public class UserPage extends Activity {


ImageView imageView1, imageView2;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.user);

    imageView1 = (ImageView)findViewById(R.id.image1);
    imageView1.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View v) { 
            // TODO Auto-generated method stub
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(i, 1);               
        }
    });
    imageView2 = (ImageView)findViewById(R.id.image2);
    imageView2.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View v) { 
            // TODO Auto-generated method stub
            Intent ii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(ii, 2);                  
        }
    });

}//OnCreate

@Override
protected void onActivityResult(int requestCode,
    int resultCode, Intent data) {
    Bitmap userImage = (Bitmap)data.getExtras().get("data");
    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode){
    case 1:
       if(resultCode == RESULT_OK){

          Bundle extras = data.getExtras();
          userImage = (Bitmap) extras.get("data");
          imageView1.setImageBitmap(userImage);
       }//if resultCode Case 1
       break;
    case 2:
       if(resultCode == RESULT_OK) {

            Bundle extras = data.getExtras();
            userImage = (Bitmap) extras.get("data");
            imageView2.setImageBitmap(userImage);

        }//if resultCode Case 2

      }//Switch 

   }//onActivityResult  
}//UserPage

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pramana.report"
android:versionCode="2"
android:versionName="1.1" >

<uses-sdk
    android:minSdkVersion="8"        
    />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature android:name="android.hardware.camera"></uses-feature> 

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name="com.pramana.report.UserPage"></activity>
</application>

</manifest>

请帮助，我已经搜索并尝试了一些建议 Take multiple images with camera and insert into multiple diffefent imageViews 但它没有用

抱歉我的英语不好我的英语不太好

Answer 1

尝试这个工作：

全球声明

ImageView iv1 ,iv2;
private static Bitmap userImage1,userImage2;

点击两个Imageview的监听器

iv1.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(i, 1);    
        }
    });

    iv2.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(i, 2);    
        }
    });

onActivityResult代码

    @Override
protected void onActivityResult(int requestCode,
    int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode){
    case 1:
       if(resultCode == RESULT_OK){
           userImage1 = (Bitmap)data.getExtras().get("data");
          Bundle extras = data.getExtras();
          userImage1 = (Bitmap) extras.get("data");
          iv1.setImageBitmap(userImage1);
       }//if resultCode Case 1
       break;
    case 2:
       if(resultCode == RESULT_OK) {
           userImage2 = (Bitmap)data.getExtras().get("data");
            Bundle extras = data.getExtras();
            userImage2 = (Bitmap) extras.get("data");
            iv2.setImageBitmap(userImage2);

        }//if resultCode Case 2

      }//Switch 

   }//onActivityResult

Answer 2

尝试这个：

private static Bitmap sImageView1 = null;

私有静态位图sImageView2 = null;

private static Uri image_uri;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

      SavedInstanceState mSavedInstanceState = savedInstanceState;

    if (mSavedInstanceState==null){
        sImageView1=null;
        sImageView2=null;
    }


            imageView1.setOnClickListener(new OnClickListener()
            {
                @Override
                public void onClick(View v) { 

                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    Uri fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
                    image_uri = fileUri;
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
                    startActivityForResult(intent, 1);       
               }
            });

        }

@Override
public void onStart() {
    super.onStart();

    if (sImageView1 !=null) {
        imageView1.setImageBitmap(userImage);
    } 
    if (sImageView2 !=null) {
        imageView2.setImageBitmap(userImage);
    } 


}

        @Override
        protected void onActivityResult(int requestCode,int resultCode, Intent data) {

        //UPDATE THIS CODE
            switch(requestCode){
             case 1:
                if(resultCode == RESULT_OK){


                    sImageView1=decodeScaledBitmapFromSdCard(image_uri.getPath(), 200, 200);

//SAVE YOUR IMAGE IN A SHARED PREFERENCES OR IN ANY LOCAL DATABASE
                    RotateBitmap(sImageView1, 0);

                    //imageView1.setImageBitmap(sImageView1);  

                }//if resultCode Case 1
            break;


            }//Switch 
        }



public Bitmap RotateBitmap(Bitmap source, float angle) {
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);

    sImageView1 = source;
    sImageView1 = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);

    imageView1.setImageBitmap(sImageView1);
    imageView1.setAdjustViewBounds(true);


    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}

Answer 3

感谢Sherin和Yograj Shinde，解决方案是我必须在开始新活动之前保存活动。这是我的代码：

UserPage.Java

public class UserPage extends Activity {

ImageView iv1 ,iv2;
private static Bitmap userImage1,userImage2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.user);

    if(savedInstanceState != null)
    {
        userImage1 = savedInstanceState.getParcelable("userImage1");
    }

    iv1 = (ImageView)findViewById(R.id.image1);
    iv2 = (ImageView)findViewById(R.id.image2);

    iv1.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(i, 1);    
        }
    });

    iv2.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(i, 2);    
        }
    });
}

@Override
public void onStart() {
    super.onStart();
    if(userImage1 != null)
    {
        iv1.setImageBitmap(userImage1);
    }
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState){
   super.onSaveInstanceState(savedInstanceState);
   savedInstanceState.putParcelable("userImage1", userImage1);
}


@Override
protected void onActivityResult(int requestCode,
    int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode){
    case 1:
       if(resultCode == RESULT_OK){
          userImage1 = (Bitmap)data.getExtras().get("data");
          Bundle extras = data.getExtras();
          userImage1 = (Bitmap) extras.get("data");
          iv1.setImageBitmap(userImage1);
       }//if resultCode Case 1
       break;
    case 2:
       if(resultCode == RESULT_OK) {
           userImage2 = (Bitmap)data.getExtras().get("data");
            Bundle extras = data.getExtras();
            userImage2 = (Bitmap) extras.get("data");
            iv2.setImageBitmap(userImage2);

        }//if resultCode Case 2

      }//Switch 

   }//onActivityResult 


}//Class UserPage

这里的想法是，当您开始新活动时，您必须保存上一个活动以防止丢失。这就是我使用

的原因

@Override
public void onSaveInstanceState(Bundle savedInstanceState){
   super.onSaveInstanceState(savedInstanceState);
   savedInstanceState.putParcelable("userImage1", userImage1);
}

在开始新活动之前保存数据，并在新活动开始时使用onStart（）设置ImageView 本文将帮助您理解：

http://developer.android.com/reference/android/app/Activity.html
How to use onSavedInstanceState example please

注意：该计划仍然需要很多改进，因为它还没有完成，但我希望它能帮助其他人

两个ImageView无法同时显示来自摄像机的图像

3 个答案: