Question

我的Java类代码有一个Button，允许用户访问摄像机，拍照，然后将该图片添加到ImageView。我未能实现此功能。

这是我的java代码：

package com.example.vikingpianomovers;

import java.io.File;
import java.io.IOException;
import java.sql.Date;
import java.text.SimpleDateFormat;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Spinner;


public class QuoteFormActivity extends Activity {


String mCurrentPhotoPath;
protected static final int MEDIA_TYPE_IMAGE = 1111;
protected static final String IMAGE_DIRECTORY_NAME = null;
private static final int RESULT_OK = 1;
private static final int REQUEST_IMAGE_CAPTURE = 0;
private static final int REQUEST_TAKE_PHOTO = 0;
ImageView mImageView = null;


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


    final EditText name = (EditText) findViewById(R.id.EditTextName);
    final EditText emailAddress = (EditText) findViewById(R.id.EditTextEmail);
    final EditText phoneNumber = (EditText) findViewById(R.id.EditPhoneNumber);
    final EditText makeModel = (EditText) findViewById(R.id.EditTextMakeModel);
    final EditText pianoSize = (EditText) findViewById(R.id.EditTextPianoSize);
    final Spinner measurementUnit = (Spinner) findViewById(R.id.spinner2);
    final EditText cityOrigin = (EditText) findViewById(R.id.EditTextCityOrigin);
    final EditText cityDest = (EditText) findViewById(R.id.EditTextCityDest);
    final EditText stairs = (EditText) findViewById(R.id.EditTextStairs);
    final ImageView mImageView = (ImageView) findViewById(R.id.attachedImage1);
    final ImageView mImageView2 = (ImageView) findViewById(R.id.attachedImage2);

    //button that starts the camera
    Button addPic = (Button) findViewById(R.id.attachPicButton);
    addPic.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {
            //button click invokes method to start camera
            dispatchTakePictureIntent();
        }

    });

    //button that sends data from form to user's email
    Button email = (Button) findViewById(R.id.SubmitButton);
    email.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            //intent to send email

            Intent email = new Intent(android.content.Intent.ACTION_SEND);

            email.setType("plain/text");
            email.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{"vikingpianomovers@yahoo.com"});
            email.putExtra(android.content.Intent.EXTRA_SUBJECT, "Viking Android App Submission");
            email.putExtra(android.content.Intent.EXTRA_TEXT, 
                    "name: " + name.getText().toString() + '\n' + '\n' +
                    "Email Address: " + emailAddress.getText().toString()+ '\n' + '\n' +
                    "Phone Number: " + phoneNumber.getText().toString() + '\n' + '\n' +
                    "Make and Model: " + makeModel.getText().toString() + '\n' + '\n' +
                    "Piano Size: " + pianoSize.getText().toString()+ '\n' + '\n' +
                    "City of Origin: " + cityOrigin.getText().toString() + '\n' + '\n' +
                    "City Destination: " + cityDest.getText().toString() + '\n' + '\n' +
                    "Number of stairs: " + stairs.getText().toString() + '\n' + '\n' +
                    "Pic(s): " + mImageView
                    );
            startActivity(Intent.createChooser(email, "Send mail..."));
        }
    });

    //layout params for LinearLayout
    LinearLayout.LayoutParams layoutParams= new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.MATCH_PARENT);

    //Create a new LinearLayout
    LinearLayout layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);
    layout.setLayoutParams(layoutParams);

    new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT);
}

@Override
//result of dispatchTakePictureIntent
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        mImageView.setImageBitmap(imageBitmap);
    }
}

//method to create image file in external directory
private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date(0));
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
        imageFileName,  /* prefix */
        ".jpg",         /* suffix */
        storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;
}

//method containing intent to access camera and create image file
private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File
           Log.i("photoFile not created", mCurrentPhotoPath);
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                    Uri.fromFile(photoFile));
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
        }
    }
}

public QuoteFormActivity() {
    // TODO Auto-generated constructor stub
}
}

这是我的xml：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content">  

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="175dp"
    android:layout_marginTop="2dp"
    android:cropToPadding="false"
    android:paddingBottom="0dp"
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:src="@drawable/vikingmobilequotelogo" />

<EditText
    android:id="@+id/EditTextName"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/namehint"
    android:inputType="textPersonName"
    android:padding="10dp" >
</EditText>

<EditText
    android:id="@+id/EditTextEmail"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/emailhint"
    android:inputType="textEmailAddress"
    android:padding="10dp" >
</EditText>

<EditText
    android:id="@+id/EditPhoneNumber"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/phonenumberhint"
    android:inputType="phone"
    android:padding="10dp" >
</EditText>

<EditText
    android:id="@+id/SpinnerTextView"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:inputType="text"
    android:hint="@string/piano_type"
    android:textSize="18sp"
    android:padding="10dp">
</EditText>

<EditText
    android:id="@+id/EditTextMakeModel"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/piano_make_model_hint"
    android:inputType="text"
    android:padding="10dp" >
</EditText>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="0dp" >

<EditText
    android:id="@+id/EditTextPianoSize"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/piano_size_hint"
    android:inputType="number"
    android:layout_weight="1"
    android:padding="10dp">
</EditText>

<Spinner
    android:id="@+id/spinner2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="5"
    android:entries="@array/piano_measurement_type"
    android:prompt="@string/piano_type_prompt" >
    </Spinner>
</LinearLayout>

<EditText 
    android:id="@+id/EditTextCityOrigin"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/origin_hint"
    android:padding="10dp">
</EditText>

<EditText 
    android:id="@+id/EditTextCityDest"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/dest_hint"
    android:padding="10dp">
</EditText>

<EditText 
    android:id="@+id/EditTextStairs"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/stairs_hint"
    android:padding="10dp">
</EditText>

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="5dp">

    <TextView
        android:id="@+id/TextViewSubmit"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:text="@string/submit_text"
        android:textSize="18sp" >
    </TextView>

    <Button
        android:id="@+id/attachPicButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:padding="10dp"
        android:text="@string/picButton" >
    </Button>
</LinearLayout>

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="5dp">

<ImageView
    android:id="@+id/attachedImage1"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:src="@drawable/ic_launcher" >"
</ImageView>

<ImageView
    android:id="@+id/attachedImage2"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:src="@drawable/ic_launcher" >
</ImageView>
</LinearLayout>

<Button 
    android:id="@+id/SubmitButton"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/submit_button_text"
    android:padding="10dp"
    android:layout_marginTop="20dp"
    android:layout_marginBottom="10dp" >
</Button>

清单：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.vikingpianomovers"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="22" />

<application
    android:allowBackup="true"
    android:icon="@drawable/viking_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:label="@string/app_name"
        android:name="QuoteFormActivity">
        <intent-filter >
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>
    <uses-feature android:name="android.hardware.camera" />
    <uses-permission android:name="android.permission.camera" />
    <uses-permission android:name="android.permission.DIAL_PHONE"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Answer 1

使用此

@Override
//result of dispatchTakePictureIntent
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
    mImageView.setImageBitmap(new BitmapDrawable(getBaseContext(),
                        getPath(data.getData(),getBaseContext())));
     }
}

也添加此方法

public String getPath(Uri uri,Context c) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = c.getContentResolver().query(uri, projection, null, null, null);
    if (cursor == null) 
        return null;
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    String s=cursor.getString(column_index);
    cursor.close();
    return s;
}

先生，这个问题和答案是关于stackoverflow的很多问题的重复，我不知道你，但如果你对它没问题，那么在这个答案解决你的问题后不要接受它并删除问题，所以在解决了所有问题之后，帮助清理网站

如何将相机中的图片添加到Android中的ImageView？

1 个答案: