如何将捕获的图像发送到第二个活动？

Question

我在MainActivity上有两个按钮。一个用于从图库中选择图像，另一个用于摄像头图像捕获。我想将这些图像发送到第二个活动。当我尝试图库图像时，我很成功。但是，现在我想将拍摄的图像传递给第二个活动。我已经尝试了很多代码，但无法获得期望的结果。

下面是我的代码....

MainActivity.java

package com.MyFirstApp.myfirstapp; 

import android.app.Activity; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 

public class MainActivity extends Activity { 

    Button btn_choose_from_gallery, btn_go_to_camera; 

    int REQUEST_GALLERY = 1; 
    int REQUEST_CAMERA = 100; 

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

     btn_choose_from_gallery = (Button) findViewById(R.id.btn_choose_from_gallery); 
     btn_go_to_camera = (Button) findViewById(R.id.btn_go_to_camera); 

     btn_choose_from_gallery.setOnClickListener(new OnClickListener() { 

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

     btn_go_to_camera.setOnClickListener(new OnClickListener() { 

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

    /* Choose Image from Gallery & Camera onActivityResult */ 
    @Override 
    protected void onActivityResult(int reqCode, int resCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(reqCode, resCode, data); 

     if (resCode == RESULT_OK) { 
      if (reqCode == REQUEST_CAMERA) { 
       if (data != null) { 
        Uri CapturedImgUri = data.getData(); 
        /* Passing ImageURI to the Second Activity */ 
        Intent IntentCamera = new Intent(this, Second.class); 
        IntentCamera.putExtra("CapturedImgUri", CapturedImgUri); 
        startActivity(IntentCamera); 
       } 
      } else if (reqCode == REQUEST_GALLERY) { 
       if (data != null) { 
        Uri selectedImgUri = data.getData(); 
        /* Passing ImageURI to the Second Activity */ 
        Intent IntentGallery = new Intent(this, Second.class); 
        IntentGallery.setData(selectedImgUri); 
        startActivity(IntentGallery); 
       } 
      } 
     } 
    } 

    /* Choose Image from Gallery onActivityResult */// This code works fine when 
                // I just want to choose 
                // image only from Gallery// 
    // @Override 
    // protected void onActivityResult(int reqCode, int resCode, Intent data) { 
    // // TODO Auto-generated method stub 
    // super.onActivityResult(reqCode, resCode, data); 
    // 
    // if (reqCode == REQUEST_GALLERY && resCode == RESULT_OK && data != null) { 
    // Uri selectedImgUri = data.getData(); 
    // 
    // /* Passing ImageURI to the Second Activity */ 
    // Intent img_pass = new Intent(this, Second.class); 
    // img_pass.setData(selectedImgUri); 
    // startActivity(img_pass); 
    // } 
    // } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

Second.java

package com.MyFirstApp.myfirstapp; 

import android.app.Activity; 
import android.database.Cursor; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Matrix; 
import android.graphics.PointF; 
import android.graphics.drawable.BitmapDrawable; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.util.DisplayMetrics; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ImageView; 
import android.widget.RelativeLayout; 

import com.devsmart.android.ui.HorizontalListView; 

public class Second extends Activity { 

    TouchImageView img_to_be_zoomed, img_to_be_zoomed_second; 
    ImageView img_back; 
    HorizontalListView HListView, HListViewFirst; 

    Bitmap bitmap_img; 

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

     img_to_be_zoomed = (TouchImageView) findViewById(R.id.img_to_be_zoomed); 
     img_to_be_zoomed_second = (TouchImageView) findViewById(R.id.img_to_be_zoomed_second); 
     img_back = (ImageView) findViewById(R.id.img_back_icon); 
     HListView = (HorizontalListView) findViewById(R.id.horizontal_list_view); 
     HListViewFirst = (HorizontalListView) findViewById(R.id.horizontal_list_view_first); 

     /* Top Back Icon */ 
     img_back.setOnClickListener(new OnClickListener() { 

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

     /* Left Image Touch Event */ 
     img_to_be_zoomed 
       .setOnTouchImageViewListener(new com.MyFirstApp.myfirstapp.TouchImageView.OnTouchImageViewListener() { 

        @Override 
        public void onMove() { 
         img_to_be_zoomed_second.setZoom(img_to_be_zoomed); 

         PointF pointF_img1 = new PointF(); 
         pointF_img1 = img_to_be_zoomed.getScrollPosition(); 
         img_to_be_zoomed_second.setScrollPosition(
           1 - pointF_img1.x, pointF_img1.y); 
        } 
       }); 
     /* Right Image touch event */ 
     img_to_be_zoomed_second 
       .setOnTouchImageViewListener(new com.MyFirstApp.myfirstapp.TouchImageView.OnTouchImageViewListener() { 

        @Override 
        public void onMove() { 
         img_to_be_zoomed.setZoom(img_to_be_zoomed_second); 

         PointF pointF_img1 = new PointF(); 
         pointF_img1 = img_to_be_zoomed_second 
           .getScrollPosition(); 
         img_to_be_zoomed.setScrollPosition(1 - pointF_img1.x, 
           pointF_img1.y); 
        } 
       }); 

     int[] HorizontalListImages = new int[] { R.drawable.icon_grid, 
       R.drawable.icon_text, R.drawable.icon_clip_art }; 
     final int[] HorizontalListImagesFirst = new int[] { 
       R.drawable.icon_go_back, R.drawable.icon_horizontal_grid, 
       R.drawable.icon_vertical_grid }; 

     /* Animation References */ 
     final Animation slideUp = AnimationUtils.loadAnimation(
       getApplicationContext(), R.anim.slide_up); 
     final Animation slideDown = AnimationUtils.loadAnimation(
       getApplicationContext(), R.anim.slide_down); 

     /* Setting Adapter for Horizontal List Views */ 
     HorizontalListViewAdapter horizontalListViewAdapter = new HorizontalListViewAdapter(
       Second.this, HorizontalListImages); 
     HListView.setAdapter(horizontalListViewAdapter); 

     /* Horizontal List View Item Click Listener */ 
     HListView.setOnItemClickListener(new OnItemClickListener() { 

      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 
       switch (position) { 
       case 0: 
        HorizontalListViewAdapterFirst horizontalListViewAdapterFirst = new HorizontalListViewAdapterFirst(
          Second.this, HorizontalListImagesFirst); 
        HListViewFirst.setAdapter(horizontalListViewAdapterFirst); 

        HListView.startAnimation(slideDown); 
        HListView.setVisibility(View.GONE); 
        HListViewFirst.startAnimation(slideUp); 
        HListViewFirst.setVisibility(View.VISIBLE); 
        break; 

       default: 
        break; 
       } 
      } 
     }); 

     HListViewFirst.setOnItemClickListener(new OnItemClickListener() { 

      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 
       switch (position) { 
       case 0: 
        HListViewFirst.startAnimation(slideDown); 
        HListViewFirst.setVisibility(View.GONE); 
        HListView.startAnimation(slideUp); 
        HListView.setVisibility(View.VISIBLE); 
        break; 

       case 1: 
        DisplayMetrics displaymetrics = new DisplayMetrics(); 
        getWindowManager().getDefaultDisplay().getMetrics(
          displaymetrics); 
        int height = displaymetrics.heightPixels; 
        int width = displaymetrics.widthPixels; 

        /* Setting Center Layout For Both Images */ 
        RelativeLayout.LayoutParams ImagelayoutParams = new RelativeLayout.LayoutParams(
          width, width); 
        ImagelayoutParams.addRule(RelativeLayout.CENTER_IN_PARENT); 
        ((RelativeLayout) findViewById(R.id.imagelayout)) 
          .setLayoutParams(ImagelayoutParams); 

        RelativeLayout.LayoutParams layoutParamsLeft = new RelativeLayout.LayoutParams(
          width/2, width); 
        layoutParamsLeft.setMargins(0, 0, 0, 0); 
        img_to_be_zoomed.setLayoutParams(layoutParamsLeft); 

        bitmap_img = ((BitmapDrawable) img_to_be_zoomed 
          .getDrawable()).getBitmap(); 
        bitmap_img = flipImage(bitmap_img, 2); 
        img_to_be_zoomed_second.setImageBitmap(bitmap_img); 

        RelativeLayout.LayoutParams layoutParamsRight = new RelativeLayout.LayoutParams(
          width/2, width); 
        layoutParamsRight.setMargins(width/2, 0, 0, 0); 
        img_to_be_zoomed_second.setLayoutParams(layoutParamsRight); 
        // img_to_be_zoomed.invalidate(); 
        img_to_be_zoomed_second.setVisibility(view.VISIBLE); 
        break; 

       default: 
        break; 
       } 
      } 
     }); 

     /* Getting ImageURI from Gallery from Main Activity */ 
     Uri selectedImgUri = getIntent().getData(); 
     String[] selectedImgPath = { MediaStore.Images.Media.DATA }; 

     Cursor cursor = getContentResolver().query(selectedImgUri, 
       selectedImgPath, null, null, null); 
     cursor.moveToFirst(); 

     int indexCol = cursor.getColumnIndex(selectedImgPath[0]); 
     String imgPath = cursor.getString(indexCol); 
     cursor.close(); 
     img_to_be_zoomed.setImageBitmap(BitmapFactory.decodeFile(imgPath)); 

     /* Getting Image from Camera from Main Activity */ 
     Uri CapturedImgUri = getIntent().getParcelableExtra("CapturedImgUri"); 
     Log.e("URI", "" + CapturedImgUri); 
     img_to_be_zoomed.setImageURI(CapturedImgUri); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.second, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    /* Flip Image Class */ 
    public Bitmap flipImage(Bitmap src, int type) { 
     Matrix matrix = new Matrix(); 
     /* Flip vertically */ 
     if (type == 1) { 
      matrix.preScale(1.0f, -1.0f); 
      /* Flip horizontally */ 
     } else if (type == 2) { 
      matrix.preScale(-1.0f, 1.0f); 
     } else { 
      return null; 
     } 
     return Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), 
       matrix, true); 
    } 
} 

的Manifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.MyFirstApp.myfirstapp" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="11" 
     android:targetSdkVersion="17" /> 

    <!-- Required Permissions --> 
    <uses-permission android:name="android.permission.CAMERA" /> 

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

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

    <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=".Second" 
      android:label="@string/title_activity_second" > 
     </activity> 
    </application> 

</manifest> 

我收到错误像下面....

01-05 04:39:21.055: E/AndroidRuntime(7471): FATAL EXCEPTION: main 
01-05 04:39:21.055: E/AndroidRuntime(7471): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyFirstApp.myfirstapp/com.MyFirstApp.myfirstapp.Second}: java.lang.NullPointerException 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread.access$600(ActivityThread.java:123) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.os.Handler.dispatchMessage(Handler.java:99) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.os.Looper.loop(Looper.java:137) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at java.lang.reflect.Method.invoke(Method.java:511) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at dalvik.system.NativeStart.main(Native Method) 
01-05 04:39:21.055: E/AndroidRuntime(7471): Caused by: java.lang.NullPointerException 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.content.ContentResolver.acquireProvider(ContentResolver.java:913) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.content.ContentResolver.query(ContentResolver.java:305) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at com.MyFirstApp.myfirstapp.Second.onCreate(Second.java:185) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.Activity.performCreate(Activity.java:4492) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
01-05 04:39:21.055: E/AndroidRuntime(7471):  ... 11 more 

在此先感谢....

Answer 1

我已经建立了解决方案，不一样的方式，我想，但略有不同的方式.....

为MainActivity.java

更改密码对于Second.java

/* Choose Image from Gallery & Camera onActivityResult */ 
@Override 
protected void onActivityResult(int reqCode, int resCode, Intent data) { 
    // TODO Auto-generated method stub 
    super.onActivityResult(reqCode, resCode, data); 

    if (resCode == RESULT_OK) { 
     if (reqCode == REQUEST_CAMERA) { 
      if (data != null) { 
       Bitmap photo = (Bitmap) data.getExtras().get("data"); 
       /* Passing BITMAP to the Second Activity */ 
       Intent IntentCamera = new Intent(this, Second.class); 
       IntentCamera.putExtra("BitmapImage", photo); 
       startActivity(IntentCamera); 
      } 
     } else if (reqCode == REQUEST_GALLERY) { 
      if (data != null) { 
       Uri selectedImgUri = data.getData(); 
       /* Passing ImageURI to the Second Activity */ 
       Intent IntentGallery = new Intent(this, Second.class); 
       IntentGallery.setData(selectedImgUri); 
       startActivity(IntentGallery); 
      } 
     } 
    } 
} 

更改密码

/* Getting ImageURI from Gallery from Main Activity */ 
    Uri selectedImgUri = getIntent().getData(); 
    if (selectedImgUri != null) { 
     Log.e("Gallery ImageURI", "" + selectedImgUri); 
     String[] selectedImgPath = { MediaStore.Images.Media.DATA }; 

     Cursor cursor = getContentResolver().query(selectedImgUri, 
       selectedImgPath, null, null, null); 
     cursor.moveToFirst(); 

     int indexCol = cursor.getColumnIndex(selectedImgPath[0]); 
     String imgPath = cursor.getString(indexCol); 
     cursor.close(); 
     img_to_be_zoomed.setImageBitmap(BitmapFactory.decodeFile(imgPath)); 
    } 

    /* Getting ImageBitmap from Camera from Main Activity */ 
    Intent intent_camera = getIntent(); 
    Bitmap camera_img_bitmap = (Bitmap) intent_camera 
      .getParcelableExtra("BitmapImage"); 
    if (camera_img_bitmap != null) { 
     img_to_be_zoomed.setImageBitmap(camera_img_bitmap); 
    } 
} 

希望这有助于someo ne ....

Answer 2

与画廊意图和字符串摄像头意图嘿，你是传递数据。在第二项活动您检索getIntent（）的getData（）。那是

在onActivityResult方法，第一个活动替换该行

Uri CapturedImgUri = data.getData(); 
       /* Passing ImageURI to the Second Activity */ 
       Intent IntentCamera = new Intent(this, Second.class); 
       IntentCamera.putExtra("CapturedImgUri", CapturedImgUri); 
       startActivity(IntentCamera); 

与

Uri CapturedImgUri = data.getData(); 
       /* Passing ImageURI to the Second Activity */ 
       Intent IntentCamera = new Intent(this, Second.class); 
       IntentCamera.putData("CapturedImgUri", CapturedImgUri); 
       startActivity(IntentCamera); 

。

希望这将工程....