Question

我有两个活动第一个活动有动态图像视图，点击我调用第二个活动，其中调用相机来捕获图像，现在我能够调用相机并捕获图像，但我将如何传递该图像到上一个活动并设置为图像视图。

String fileName = "testphoto.jpg";
    ContentValues values = new ContentValues();
    values.put(MediaStore.Images.Media.TITLE, fileName);
    values.put(MediaStore.Images.Media.DESCRIPTION,
            "Image capture by camera");
    values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
    imageUri = getContentResolver().insert(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
    intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
    startActivityForResult(intent, IMAGE_CAPTURE);

Answer 1

似乎你试图从相机中捕捉图像并设置你的视图，但我认为你不需要两个活动来实现你的目标。

您可以在startActivityForResult的帮助下实现单一活动。

只需点击图片查看即可致电Camera Intent，并在同一活动中取回您的结果，请查看以下代码：

定义捕获图像的路径：

String filepath = Environment.getExternalStorageDirectory()+"/foldername/"+filename;
System.out.println("thumbnail path~~~~~~"+filepath);
File file = new File(filepath);
Uri outputFileUri = Uri.fromFile(file);

点击图片查看代码：

Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(intent, 100);

同一活动中的

onActivityResult：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 100) {
        sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));
        Bitmap bitmap;
        bitmap=GlobalMethods.decodeFile(_path);//function to decode.
        if (bitmap == null) {
            ivPhy.setImageBitmap(bitmap);
        } 
        else {
            ivPhy.setImageBitmap(bitmap);
            ivPhy.setScaleType(ScaleType.FIT_XY);
        }
    }


}

必需的权限传递到清单文件：

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

Answer 2

最后，我在startActivityForResult的帮助下实现了两项活动。

检查下面的代码，希望对您有所帮助：

<强> main.xml中

<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"
    tools:context=".MainActivity" >



    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="57dp"
        android:layout_marginTop="84dp"
        android:text="Button" />


     <ImageView
        android:id="@+id/image"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
         />

</RelativeLayout>

<强> FirstActivity.java

它将使用startActivityResult

打开第二个活动

package com.example.demo_cameraintent;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class MainActivity extends Activity {
    ImageView image;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        image=(ImageView)findViewById(R.id.image);

        String extStorageDirectory = Environment.getExternalStorageDirectory()
                + "/testing";

      File xmlDirectory = new File(extStorageDirectory);
        if (!xmlDirectory.exists())
            xmlDirectory.mkdirs();

        Button btn=(Button)findViewById(R.id.button1);

        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent i = new Intent(MainActivity.this, SecondActivity.class);
                startActivityForResult(i, 1);

            }
        });
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == 1) {

             if(resultCode == RESULT_OK){

              String result=data.getStringExtra("result");
              Log.d("*****************", "inside onactivityresult in main activity="+result);

            Bitmap bitmap = BitmapFactory.decodeFile(result);
            image.setImageBitmap(bitmap);
            image.setScaleType(ScaleType.FIT_XY);

        }

        if (resultCode == RESULT_CANCELED) {



             //Write your code on no result return 

        }
        }//onAcrivityResult


    }
}

<强> SecondActivity.java

此处调用它将直接打开cameraIntent并在onActivityResult内，它将返回带有输出的Firstactivity

package com.example.demo_cameraintent;

import java.io.File;

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

public class SecondActivity extends Activity {
    String filepath;

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

         filepath = Environment.getExternalStorageDirectory()+"/testing/"+"test.jpg";
        System.out.println("thumbnail path~~~~~~"+filepath);
        File file = new File(filepath);
        Uri outputFileUri = Uri.fromFile(file);


        Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
        startActivityForResult(intent, 100);


    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
            if (requestCode == 100) {

                 Intent returnIntent = new Intent();
                 returnIntent.putExtra("result",filepath);
                 setResult(RESULT_OK,returnIntent);     
                 finish();
        }


    }



}

<强>的Manifest.xml

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.demo_cameraintent.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/app_name" >
        </activity>
    </application>

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

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

</manifest>

Answer 3

而不是使用ContentValues创建imageUri，只需将您的图片存储在SD卡中，如下所示：

String path=Environment.getExternalStorageDirectory().getAbsolutePath()+"/testphoto.jpg";
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(path)) );

之后，在调用第二个活动时，只需传递文件路径，如下所示：

intent.putExtra("pathOfImage",path);

现在，在第二个活动中，您只需从sdcard中检索图像：

File f = new File(getIntent().getStringExtra("pathOfImage"));
ImageView mImgView1 = (ImageView)findViewById(R.id.imageView);
Bitmap bmp = BitmapFactory.decodeFile(f.getAbsolutePath());
mImgView1.setImageBitmap(bmp);

如何将捕获的图像传递给不同的活动以设置为android中的图像视图

3 个答案: