从图库加载图像到ImageButton（查看）

即时通讯寻找在同一个布局上有两个按钮，您单击第一个按钮，选择一个图像，该按钮将变为所选图像。您单击第二个按钮并选择该图像将替换该按钮。最容易使用imageButton而不是ImageView。如果可能，我想要代码，谢谢。从图库加载图像到ImageButton（查看）

（静止不明白的端应为2倍的图像彼此相邻由用户选择？）

MainActivity：

package com.example.triptych; 

import android.app.Activity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.graphics.BitmapFactory; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.view.View; 
import android.widget.ImageButton; 
import android.widget.Toast; 

public class MainActivity extends Activity { 
    private static int RESULT_LOAD_IMG = 1; 
    String imgDecodableString; 

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

    public void loadImagefromGallery(View view) { 
     // Create intent to Open Image applications like Gallery, Google Photos 
     Intent galleryIntent = new Intent(Intent.ACTION_PICK, 
       android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
     // Start the Intent 
     startActivityForResult(galleryIntent, RESULT_LOAD_IMG); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     try { 
      // When an Image is picked 
      if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK 
        && null != data) { 
       // Get the Image from data 

       Uri selectedImage = data.getData(); 
       String[] filePathColumn = { MediaStore.Images.Media.DATA }; 

       // Get the cursor 
       Cursor cursor = getContentResolver().query(selectedImage, 
         filePathColumn, null, null, null); 
       // Move to first row 
       cursor.moveToFirst(); 

       int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
       imgDecodableString = cursor.getString(columnIndex); 
       cursor.close(); 
       ImageButton imageButton = (ImageButton) findViewById(R.id.buttonLoadPicture); 
       // Set the Image in ImageView after decoding the String 
       imageButton.setImageBitmap(BitmapFactory 
         .decodeFile(imgDecodableString)); 

      } else { 
       Toast.makeText(this, "You haven't picked Image", 
         Toast.LENGTH_LONG).show(); 
      } 
     } catch (Exception e) { 
      Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG) 
        .show(); 
     } 

    } 

}

activity_main.xml中：

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

    <ImageButton 
     android:id="@+id/buttonLoadPicture" 
     android:layout_width="160dp" 
     android:layout_height="300dp" 
     android:layout_marginLeft="10dp" 
     android:layout_weight="0.51" 
     android:contentDescription="TODO" 
     android:onClick="loadImagefromGallery" 
     android:src="@drawable/ic_launcher" 
     android:text="@string/load_picture" /> 

    <ImageButton 
     android:id="@+id/button2" 
     android:layout_width="160dp" 
     android:layout_height="300dp" 
     android:layout_marginLeft="180dp" 
     android:layout_weight="0.51" 
     android:contentDescription="TODO" 
     android:onClick="loadImagefromGallery" 
     android:src="@drawable/ic_launcher" 
     android:text="@string/load_picture" /> 

</RelativeLayout>

另一个问题，我是否为第二个按钮创建另一个活动并粘贴相同的代码，或者我是否对同一活动执行此操作？

来源

2015-04-08 Harrison

这里的每个人都不会为你写代码。如果你有书面的代码，然后告诉我们。我们可以帮助解决问题。 @Harrison – Pooja

我已经编写了代码，我将编辑帖子，但是我注意到每次写出代码时，我都会在帖子中收到负面反馈。 – Harrison

负面反馈背后可能有某种原因。 @Harrison – Pooja

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical" > 
    <ImageButton 
    android:id="@+id/buttonLoadPicture" 
    android:layout_width="160dp" 
    android:layout_height="300dp" 
    android:layout_marginLeft="10dp" 
    android:layout_weight="0.51" 
    android:contentDescription="TODO" 
    android:onClick="loadImagefromGallery" 
    android:src="@drawable/ic_launcher" 
    android:text="@string/load_picture" /> 

<ImageButton 
    android:id="@+id/button2" 
    android:layout_width="160dp" 
    android:layout_height="300dp" 
    android:layout_marginLeft="180dp" 
    android:layout_weight="0.51" 
    android:contentDescription="TODO" 
    android:onClick="loadImagefromGallery" 
    android:src="@drawable/ic_launcher" 
    android:text="@string/load_picture" />

来源

2015-04-08 06:13:08

你可以尝试这样的事情：

在你MainActivity类，你需要创建2种不同的方法来处理图库中选择图片，并把它在两个不同的点击图片按钮，请参阅以下代码：您的MainActivity.jav a将如下所示：

public class MainActivity extends ActionBarActivity { 
    private static int RESULT_LOAD_IMG = 1, RESULT_LOAD_IMG_TWO = 2; 
    String imgDecodableString, imgDecodableStringTwo; 
    ImageButton btn_load, btn_loadTwo; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     btn_load = (ImageButton) findViewById(R.id.buttonLoadPicture); 
     btn_loadTwo = (ImageButton) findViewById(R.id.buttonLoad); 
     btn_loadTwo.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       loadImagefromGalleryTwo(btn_loadTwo); 
      } 
     }); 
     btn_load.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       loadImagefromGallery(btn_load); 
      } 
     }); 
    } 

    public void loadImagefromGallery(View view) { 
     Intent galleryIntent = new Intent(Intent.ACTION_PICK, 
       android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
     startActivityForResult(galleryIntent, RESULT_LOAD_IMG); 
    } 

    public void loadImagefromGalleryTwo(View view) { 
     Intent galleryIntent = new Intent(Intent.ACTION_PICK, 
       android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
     startActivityForResult(galleryIntent, RESULT_LOAD_IMG_TWO); 
    } 

    @SuppressLint("NewApi") 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     try { 
      if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK && null != data) { 

       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]); 
       imgDecodableString = cursor.getString(columnIndex); 
       cursor.close(); 

       Drawable d = new BitmapDrawable(getResources(), BitmapFactory.decodeFile(imgDecodableString)); 
       btn_load.setBackground(d); 

      } else if (requestCode == RESULT_LOAD_IMG_TWO && resultCode == RESULT_OK && null != data) { 
       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]); 
       imgDecodableStringTwo = cursor.getString(columnIndex); 
       cursor.close(); 

       Drawable d = new BitmapDrawable(getResources(), BitmapFactory.decodeFile(imgDecodableStringTwo)); 
       btn_loadTwo.setBackground(d); 
      } 
     } catch (Exception e) { 
      Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG).show(); 
     } 

    } 
}

输出： enter image description here

希望它能帮助！

来源

2015-04-08 06:49:55

嘿，男士，谢谢你的回复！我使用了代码，但.setOnClickListener无法正常工作，即时通讯出错，是否适用于您？ – Harrison

getContentResolver（）。查询不应该从UI线程调用

来源

2016-06-07 07:40:59 Yoho

从图库加载图像到ImageButton（查看）

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