如何将 phone 相机拍摄的图像从一个 activity 移动到另一个 activity 的图像视图？

Question

第一个 activity 有一个按钮，单击该按钮可打开内置摄像头。现在，当拍摄照片时，会打开一个新的 activity，其中在 imageView 中拍摄的图像和下一个 activity 中的共享按钮。我已将 activity 设置为在拍摄图像后打开，但是我无法传输跨活动拍摄的图像。请我在正确的方向上需要帮助或推动。

第一个拍照的activity是Takepicture.java:

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.os.Environment;
import java.io.File;
import java.util.Date;

public class TakePicture extends Activity {
Button camerabutton;
Intent intent;
int requestCode;
int resultCode;
static int REQUEST_IMAGE_CAPTURE = 1;
SharedPreferences imagepreferences;
SharedPreferences.Editor imageeditor;
private String imgPath;
Uri setImageUri;
File file;
Uri imgUri;
public String getImagePath;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.takepicture);
    camerabutton = (Button) findViewById(R.id.button6);
    imagepreferences=getSharedPreferences("image", MODE_PRIVATE);
    imageeditor=imagepreferences.edit();
    camerabutton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (intent.resolveActivity(getPackageManager()) != null)
                startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
    }
    });
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        startActivity(new Intent(TakePicture.this, Aftertakepicture.class));
    }
}
}

第二个activity,Aftertakepicture.java:

package com.example.kesandunwokolo.febclasstest;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.ImageView;

public class Aftertakepicture extends Activity {
Button camerabutton;
ImageView saveimage;
Button sharebutton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.aftertakepicture);
    camerabutton=(Button)findViewById(R.id.button6);
    saveimage=(ImageView)findViewById(R.id.imageView2);
    sharebutton=(Button)findViewById(R.id.button7);
}
}

第takepicture.xml为第activity:

<?xml version="1.0" encoding="utf-8"?>

<Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Take Picture"
    android:id="@+id/button6" />

aftertakepicture.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_gravity="center_vertical">

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Take Picture"
        android:id="@+id/button6" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView2"
        android:minHeight="100dp"
        android:minWidth="100dp" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Share"
        android:id="@+id/button7" />
</LinearLayout>

如有任何帮助，我们将不胜感激！

Answer 1

有几种方法可以做到这一点，通过在 Intent 中发送 bitmap 本身（不推荐）或者将图像保存到存储并在 intent 内发送其路径，推荐。首先将图像保存到 SDCARD，然后在 intent 中传递它，例如

Intent intent = new Intent(this,MyClass.class);
Bundle bundle = new Bundle();
bundle.putString("IMAGE_PATH",imageFile);
intent.putExtras(bundle);
startActivity(intent);

然后在另一个 activity 中你可以使用

String path = getIntent().getExtras().getString("IMAGE_PATH");
Bitmap bmp = BitmapFactory.decodeFile(path);
myImage.setImageBitmap(bmp);

Answer 2

参考这个。您应该将图像保存在文件中并获取该图像的文件路径。然后，您可以将图像路径传递给第二个 activity.

Answer 3

这是我的解决方案，我已经在我的环境中进行了测试。希望这对您有所帮助！

如果使用模拟器进行测试，请确保像这样支持相机

更新完整源代码（新项目）：

MainActivity.java:

package com.example.photocapture;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.Menu;
import android.view.MenuItem;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class MainActivity extends Activity {

    private Uri mFileUri;
    private final Context mContext = this;

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

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        mFileUri = getOutputMediaFileUri(1);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);

        // start the image capture Intent
        startActivityForResult(intent, 100);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
        super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

        if (resultCode == RESULT_OK) {
            if (mFileUri != null) {
                String mFilePath = mFileUri.toString();
                if (mFilePath != null) {
                    Intent intent = new Intent(mContext, SecondActivity.class);
                    intent.putExtra("filepath", mFilePath);
                    startActivity(intent);
                }
            }
        }               
    }

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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));
    }

    // Return image / video
    private static File getOutputMediaFile(int type) {

        // External sdcard location
        File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "DCIM/Camera");

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
        File mediaFile;
        if (type == 1) { // image
            mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
        } else if (type == 2) { // video
            mediaFile = new File(mediaStorageDir.getPath() + File.separator + "VID_" + timeStamp + ".mp4");
        } else {
            return null;
        }

        return mediaFile;
    }
}

SecondActivity.java:

package com.example.photocapture;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;

import java.io.File;

public class SecondActivity extends Activity {

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

        Intent intent = getIntent();
        String filepath = intent.getStringExtra("filepath");
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 8; // down sizing image as it throws OutOfMemory Exception for larger images
        filepath = filepath.replace("file://", ""); // remove to avoid BitmapFactory.decodeFile return null
        File imgFile = new File(filepath);
        if (imgFile.exists()) {
            ImageView imageView = (ImageView) findViewById(R.id.imageView);
            Bitmap bitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath(), options);
            imageView.setImageBitmap(bitmap);
        }
    }

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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

activity_main.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

activity_second.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.photocapture.SecondActivity">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

</RelativeLayout>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.photocapture" >

    <application
        android:allowBackup="true"
        android:icon="@mipmap/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=".SecondActivity"
            android:label="@string/title_activity_second" >
        </activity>
    </application>

</manifest>

新项目结束

------------------

第一个活动：

    private final Context mContext = this;

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

       buttonCapturePicture.setOnClickListener(new View.OnClickListener() {

           @Override
           public void onClick(View v) {                   
               captureImage();
           }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
        super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

        if (resultCode == RESULT_OK) {
            if (mFileUri != null) {
                mFilePath = mFileUri.toString();
                if (mFilePath != null) {                    
                    Intent intent = new Intent(mContext, SecondActivity.class);
                    intent.putExtra("filepath", mFilePath);
                    startActivity(intent);
                }
            }
        }

        // refresh phone's folder content
        sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
    }

    private void captureImage() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        mFileUri = getOutputMediaFileUri(1);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);

        // start the image capture Intent
        startActivityForResult(intent, 100);
    }


    private Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));
    }

    private static File getOutputMediaFile(int type) {
        // External sdcard location
        File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "DCIM/Camera");

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
        File mediaFile;
        if (type == 1) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
        } else if (type == 2) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator + "VID_" + timeStamp + ".mp4");
        } else {
            return null;
        }

        return mediaFile;
    }

第二个活动：

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

        super.addContentView(R.layout.activity_second);

        Intent intent = getIntent();
        mFilePath = intent.getStringExtra("filepath");
        previewMedia();
        ...
    }

    private void previewMedia() {              
            BitmapFactory.Options options = new BitmapFactory.Options();            
            options.inSampleSize = 8; // down sizing image as it throws OutOfMemory Exception for larger images
            mFilePath = mFilePath.replace("file://", ""); // remove to avoid BitmapFactory.decodeFile return null
            File imgFile = new File(mFilePath);
            if (imgFile.exists()) {
                final Bitmap bitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath(), options);
                mImagePreview.setImageBitmap(bitmap);
            }
        }

如何将 phone 相机拍摄的图像从一个 activity 移动到另一个 activity 的图像视图？

How to move image captured with the phone camera from one activity to an image view in another activity?

android

android-camera

sharedpreferences

android-camera-intent

android-capture