如何移动与手机摄像头拍摄的图像从一个活动到另一个活动的形象有何看法？ [英] How to move image captured with the phone camera from one activity to an image view in another activity?

问题描述

的第一项活动有一个按钮，点击它时，打开内置的摄像头。现在，拍摄照片时，一个新的活动打开与在的ImageView拍摄的图像，并在接下来的活动一个分享按钮。我已经设置了拍摄图像后，打开活动，但我无法传输整个活动拍摄的图像。请我需要帮助，或者在正确的方向轻推。

The first activity has a button which when clicked, opens the inbuilt camera. Now when the picture is taken, a new activity opens with the image captured in an imageView and a share button in the next activity. I have set up the activity to open after the image is taken, however I am unable to transfer image captured across activities. Please i need help or a nudge in the right direction.

这需要图片中的第一个活动是 Takepicture.java ：

The first activity which takes the picture is 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));
    }
}
}

第二项活动， 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);
}
}

在 takepicture.xml 的第一个活动：

<?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" />

在 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>

请任何帮助，将AP preciated！

please any help would be appreciated!

推荐答案

下面是我的解决办法，我已经在我的环境中进行测试。希望这有助于！

Here are my solution, I have tested in my environment. Hope this helps!

如果使用模拟器来测试，使支持这样确保相机

If using emulator to test, make sure camera supported like this

更新WIH完整的源$ C ​​$ C（新项目）：

MainActivity.java：

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：

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：

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：

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中：

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>

END新项目的

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

FirstActivity：

FirstActivity:

    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;
    }

SecondActivity：

SecondActivity:

    @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);
            }
        }

这篇关于如何移动与手机摄像头拍摄的图像从一个活动到另一个活动的形象有何看法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！