從圖庫加載圖像到ImageButton（查看）

即時通訊尋找在同一個佈局上有兩個按鈕，您單擊第一個按鈕，選擇一個圖像，該按鈕將變爲所選圖像。您單擊第二個按鈕並選擇該圖像將替換該按鈕。最容易使用imageButton而不是ImageView。如果可能，我想要代碼，謝謝。從圖庫加載圖像到ImageButton（查看）

（靜止不明白的端應爲2倍的圖像彼此相鄰由用戶選擇？）

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>

另一個問題，我是否爲第二個按鈕創建另一個活動並粘貼相同的代碼，或者我是否對同一活動執行此操作？

來源

2015-04-08 Harrison

這裏的每個人都不會爲你寫代碼。如果你有書面的代碼，然後告訴我們。我們可以幫助解決問題。 @Harrison – Pooja

我已經編寫了代碼，我將編輯帖子，但是我注意到每次寫出代碼時，我都會在帖子中收到負面反饋。 – Harrison

負面反饋背後可能有某種原因。 @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" />

來源

2015-04-08 06:13:08

你可以嘗試這樣的事情：

在你MainActivity類，你需要創建2種不同的方法來處理圖庫中選擇圖片，並把它在兩個不同的點擊圖片按鈕，請參閱以下代碼：您的MainActivity.jav a將如下所示：

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(); 
     } 

    } 
}

輸出： enter image description here

希望它能幫助！

來源

2015-04-08 06:49:55

嘿，男士，謝謝你的回覆！我使用了代碼，但.setOnClickListener無法正常工作，即時通訊出錯，是否適用於您？ – Harrison

getContentResolver（）。查詢不應該從UI線程調用

來源

2016-06-07 07:40:59 Yoho

從圖庫加載圖像到ImageButton（查看）

回答

相關問題