android用相机拍摄多张图片 [英] android take multiple image with camera
本文介绍了android用相机拍摄多张图片的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经制作了一个代码，用于使用设备内置摄像头捕获图像并将其存档在数据库服务器中。每次我捕获图像并查看它时，它将动态地生成另一个 ImageView 布局（例如：图像 ic_launcher ） 。
每当点击 ic_launcher 图片时，它都会转到 MainActivity.java 页面，并使用意图，拍摄另一张照片。
我的问题是，如何在 uploadActivity.java 中查看所有捕获的图像/存档图像？
注意：图片在 uploadactivity.java
mainactivity.java
private void captureImage（ ）{
意图意图=新意图（MediaStore.ACTION_IMAGE_CAPTURE）;
fileUri = getOutputMediaFileUri（MEDIA_TYPE_IMAGE）;
intent.putExtra（MediaStore.EXTRA_OUTPUT，fileUri）;
//启动图像捕获Intent
startActivityForResult（intent，CAMERA_CAPTURE_IMAGE_REQUEST_CODE）;
}
@Override
protected void onSaveInstanceState（Bundle outState）{
super.onSaveInstanceState（outState）;
//将文件url保存在bundle中，因为它在屏幕方向上为null
//更改
outState.putParcelable（file_uri，fileUri）;
}
@Override
protected void onRestoreInstanceState（Bundle savedInstanceState）{
super.onRestoreInstanceState（savedInstanceState）;
//获取文件url
fileUri = savedInstanceState.getParcelable（file_uri）;
}
/ **
*关闭相机后将调用接收活动结果方法
* * /
@Override
protected void onActivityResult（int requestCode，int resultCode，Intent data）{
//如果结果正在捕获Image
if（requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE）{
if （resultCode == RESULT_OK）{
launchUploadActivity（true）;
}否则if（resultCode == RESULT_CANCELED）{
//用户取消图像捕获
Toast.makeText（getApplicationContext（），
用户取消图像捕获，Toast.LENGTH_SHORT）
.show（）;
} else {
//无法捕获图像
Toast.makeText（getApplicationContext（），
抱歉！无法捕获图像，Toast.LENGTH_SHORT）
.show（）;
}
}
}
private void launchUploadActivity（boolean isImage）{
Intent i = new Intent（MainActivity.this，UploadActivity 。类）;
i.putExtra（filePath，fileUri.getPath（））;
i.putExtra（isImage，isImage）;
startActivity（i）;
}
/ **
* ------------助手方法--------------- -------
* * /
public Uri getOutputMediaFileUri（int type）{
return Uri.fromFile（getOutputMediaFile（type））;
}
私有静态文件getOutputMediaFile（int type）{
//外部sdcard位置
文件mediaStorageDir =新文件（
环境
.getExternalStoragePublicDirectory（Environment.DIRECTORY_PICTURES），
Config.IMAGE_DIRECTORY_NAME）;
//如果存储目录不存在，则创建存储目录
if（！mediaStorageDir.exists（））{
if（！mediaStorageDir.mkdirs（））{
Log.d（TAG，糟糕！创建失败
+ Config.IMAGE_DIRECTORY_NAME +目录）;
返回null;
}
}
//创建媒体文件名
字符串timeStamp = new SimpleDateFormat（yyyyMMdd_HHmmss，
Locale.getDefault（））。 format（new Date（））;
文件mediaFile;
mediaFile = new File（mediaStorageDir.getPath（）+ File.separator
+IMG_+ timeStamp +.jpg）;
返回mediaFile;
}
UploadActivity.java
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
setContentView（R.layout.activity_upload）;
txtPercentage =（TextView）findViewById（R.id.txtPercentage）;
btnUpload =（Button）findViewById（R.id.btnUpload）;
Button btnTaking =（Button）findViewById（R.id.btntake）;
layout2 =（LinearLayout）findViewById（R.id.ly2）;
progressBar =（ProgressBar）findViewById（R.id.progressBar）;
vidPreview =（VideoView）findViewById（R.id.videoPreview）;
//更改操作栏背景颜色
getActionBar（）。setBackgroundDrawable（
new ColorDrawable（Color.parseColor（getResources（）。getString（
） R.color.action_bar））））;
//接收先前活动的数据
Intent intent = getIntent（）;
//在之前的活动中捕获的图像或视频路径
filePath = intent.getStringExtra（filePath）;
ArrayList< String> yourFilePaths = new ArrayList<>（）; //创建ArrayList
//首先你必须检查你是否保存了文件路径
SharedPreferences prefs = getSharedPreferences（SavedFilePaths，
Context.MODE_PRIVATE）;
String myJSONArrayString = prefs.getString（SavedFilePathsJSONArray，
）;
if（！myJSONArrayString.isEmpty（））{
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray（myJSONArrayString）;
} catch（JSONException e）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
for（int i = 0; i< jsonArray.length（）; i ++）{
try {
yourFilePaths.add（jsonArray.get（i）.toString （））;
} catch（JSONException e）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
}
}
//添加您拍摄的最后一张照片
yourFilePaths.add（filePath）;
//在SharedPreferences中保存新的ArrayList：
JSONArray mJSONArray = new JSONArray（yourFilePaths）;
SharedPreferences.Editor editor = prefs.edit（）;
editor.putString（SavedFilePathsJSONArray，mJSONArray.toString（））;
//按filePaths显示图像
文件imgFile;
for（int i = 0; i< yourFilePaths.size（）; ++ i）{
imgFile = new File（yourFilePaths.get（i））;
if（imgFile.exists（））{
final BitmapFactory.Options options = new BitmapFactory.Options（）;
options.inSampleSize = 8;
Bitmap myBitmap = BitmapFactory.decodeFile（imgFile.getAbsolutePath（），options）;
ImageView myImage = new ImageView（this）;
myImage.setImageBitmap（myBitmap）; //在这一步你需要
//创建动态imageViews
//来查看多个
//图片
layout2.addView（myImage）; //然后将您的动态图片视图添加到
//您的布局
}
}
btnTaking.setOnClickListener（new OnClickListener（）{
@Override
public void onClick（View v）{
// TODO自动生成的方法stub
Intent intent = new Intent（UploadActivity.this，MainActivity.class）;
startActivity（intent）;
}
}）;
btnUpload.setOnClickListener（new View.OnClickListener（）{
@Override
public void onClick（View v）{
//上传文件服务器
new UploadFileToServer（）。execute（）;
}
}）;
}
Activity_Upload
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
android： layout_width =fill_parent
android：layout_height =fill_parent
android：background =@ color / view_background
android：orientation =vertical
android：padding = 10dp>
<！ - 显示拍摄的照片 - >
< LinearLayout
android：id =@ + id / ly2
android：layout_width =wrap_content
android：layout_height = 100dp
android：orientation =vertical>
< / LinearLayout>
< TextView
android：id =@ + id / txtPercentage
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_gravity =center_horizontal
android：layout_marginBottom =15dp
android：layout_marginTop =15dp
android：textColor =@ color / txt_font
android ：textSize =30dp/>
< ProgressBar
android：id =@ + id / progressBar
style =？android：attr / progressBarStyleHorizontal
android：layout_width =fill_parent
android：layout_height =20dp
android：layout_marginBottom =35dp
android：visibility =gone/>
< Button
android：id =@ + id / btnUpload
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_gravity =center_horizontal
android：layout_marginBottom =20dp
android：background =@ color / btn_bg
android：paddingLeft =20dp
android ：paddingRight =20dp
android：text =@ string / btnUploadToServer
android：textColor =@ color / white
android：visibility =gone
/ >
< TextView
android：id =@ + id / idt
android：layout_width =wrap_content
android：layout_height =wrap_content
/>
< Button
android：id =@ + id / btntake
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_gravity =center_horizontal
android：layout_marginBottom =20dp
android：background =@ color / btn_bg
android：paddingLeft =20dp
android ：paddingRight =20dp
android：text =拍下另一张照片
android：textColor =@ color / white/>
输出
注意：我从 androidhive
获得此代码解决方案
现在好了我想我明白你的问题。
要了解我的代码，请检查以下内容：
解决你的问题？
I've already made a code for capturing an image using device built-in camera and archiving it in the database server. For each time I captures an image and views it, it will make another ImageView layout dynamically (ex: the image is ic_launcher).
Whenever the ic_launcher image is clicked, it will go to the MainActivity.java page, with the use of intent, to take another image.
My question is, how can I view all of the captured images / archived images in the uploadActivity.java?
Note: the image is viewed in the uploadactivity.java
mainactivity.java
private void captureImage() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
// start the image capture Intent
startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// save file url in bundle as it will be null on screen orientation
// changes
outState.putParcelable("file_uri", fileUri);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
// get the file url
fileUri = savedInstanceState.getParcelable("file_uri");
}
/**
* Receiving activity result method will be called after closing the camera
* */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
launchUploadActivity(true);
} else if (resultCode == RESULT_CANCELED) {
// user cancelled Image capture
Toast.makeText(getApplicationContext(),
"User cancelled image capture", Toast.LENGTH_SHORT)
.show();
} else {
// failed to capture image
Toast.makeText(getApplicationContext(),
"Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show();
}
}
}
private void launchUploadActivity(boolean isImage){
Intent i = new Intent(MainActivity.this, UploadActivity.class);
i.putExtra("filePath", fileUri.getPath());
i.putExtra("isImage", isImage);
startActivity(i);
}
/**
* ------------ Helper Methods ----------------------
* */
public Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
Config.IMAGE_DIRECTORY_NAME);
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d(TAG, "Oops! Failed create "
+ Config.IMAGE_DIRECTORY_NAME + " directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
UploadActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);
txtPercentage = (TextView) findViewById(R.id.txtPercentage);
btnUpload = (Button) findViewById(R.id.btnUpload);
Button btnTaking = (Button)findViewById(R.id.btntake);
layout2 = (LinearLayout) findViewById(R.id.ly2);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
vidPreview = (VideoView) findViewById(R.id.videoPreview);
// Changing action bar background color
getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor(getResources().getString(
R.color.action_bar))));
// Receiving the data from previous activity
Intent intent = getIntent();
// image or video path that is captured in previous activity
filePath = intent.getStringExtra("filePath");
ArrayList<String> yourFilePaths = new ArrayList<>();// Create ArrayList
// first you have to check if you've saved filepaths
SharedPreferences prefs = getSharedPreferences("SavedFilePaths",
Context.MODE_PRIVATE);
String myJSONArrayString = prefs.getString("SavedFilePathsJSONArray",
"");
if (!myJSONArrayString.isEmpty()) {
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(myJSONArrayString);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (int i = 0; i < jsonArray.length(); i++) {
try {
yourFilePaths.add(jsonArray.get(i).toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// add the last photo you've taken
yourFilePaths.add(filePath);
// Save the new ArrayList in SharedPreferences:
JSONArray mJSONArray = new JSONArray(yourFilePaths);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("SavedFilePathsJSONArray", mJSONArray.toString());
// Show images by filePaths
File imgFile;
for (int i = 0; i < yourFilePaths.size(); ++i) {
imgFile = new File(yourFilePaths.get(i));
if (imgFile.exists()) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath(),options);
ImageView myImage = new ImageView(this);
myImage.setImageBitmap(myBitmap);// In this step you've to
// create dynamic imageViews
// to see more than one
// picture
layout2.addView(myImage);// Then add your dynamic imageviews to
// your layout
}
}
btnTaking.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(UploadActivity.this, MainActivity.class);
startActivity(intent);
}
});
btnUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// uploading the file to server
new UploadFileToServer().execute();
}
});
}
Activity_Upload
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/view_background"
android:orientation="vertical"
android:padding="10dp" >
<!-- To display picture taken -->
<LinearLayout
android:id="@+id/ly2"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical" >
</LinearLayout>
<TextView
android:id="@+id/txtPercentage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="15dp"
android:layout_marginTop="15dp"
android:textColor="@color/txt_font"
android:textSize="30dp" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="fill_parent"
android:layout_height="20dp"
android:layout_marginBottom="35dp"
android:visibility="gone" />
<Button
android:id="@+id/btnUpload"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="20dp"
android:background="@color/btn_bg"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:text="@string/btnUploadToServer"
android:textColor="@color/white"
android:visibility="gone"
/>
<TextView
android:id="@+id/idt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/btntake"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="20dp"
android:background="@color/btn_bg"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:text="Take Another Picture"
android:textColor="@color/white" />
Output
Note: i got this code from androidhive
解决方案
Ok now i think i understand your problem. To understand my code check this:
Show Image View from file path in android?
Create ImageViews dynamically inside a loop
Last Edit: add commit() solve the problem
What we are going to try is save the file paths in ArrayList and save this array in a SharedPreferences:
layout_example.xml <-- create a Layout on your xml to add imageViews inside
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:padding="5dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/myLinearLayout"></LinearLayout>
</RelativeLayout>
UploadActivity.java
Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);//add the LinearLayout of the layout_example.xml
txtPercentage = (TextView) findViewById(R.id.txtPercentage);
btnUpload = (Button) findViewById(R.id.btnUpload);
layout = (LinearLayout) findViewById(R.id.ly1);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
imgPreview = (ImageView) findViewById(R.id.imgPreview);
addImageView(layout);
// Changing action bar background color
getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor(getResources().getString(
R.color.action_bar))));
// Receiving the data from previous activity
Intent i = getIntent();
// image or video path that is captured in previous activity
filePath = i.getStringExtra("filePath");
LinearLayour ly_myLayout = (LinearLayout)findViewById(R.id.myLinearLayout);
ArrayList<String> yourFilePaths = new ArrayList<>();//Create ArrayList
//first you have to check if you've saved filepaths
SharedPreferences prefs = getSharedPreferences("SavedFilePaths", Context.MODE_PRIVATE);
String myJSONArrayString = prefs.getString("SavedFilePathsJSONArray", "");
if(!myJSONArrayString.isEmpty()){
JSONArray jsonArray = new JSONArray(myJSONArrayString);
for (int i=0;i<jsonArray.length();i++){
yourFilePaths.add(jsonArray.get(i).toString());
}
}
//add the last photo you've taken
yourFilePaths.add(filePath);
//Save the new ArrayList in SharedPreferences:
JSONArray mJSONArray = new JSONArray(yourFilePaths);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("SavedFilePathsJSONArray",mJSONArray.toString()).commit(); // add commit
//Show images by filePaths
File imgFile;
for (int i = 0; i < yourFilePaths.size(); ++i) {
imgFile = new File(yourFilePaths.get(i));
if(imgFile.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
ImageView myImage = new ImageView(this);
myImage.setImageBitmap(myBitmap);// In this step you've to create dynamic imageViews to see more than one picture
ly_myLayout.addView(myImage);//Then add your dynamic imageviews to your layout
}
}
btnUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// uploading the file to server
new UploadFileToServer().execute();
}
});
}
/**
* Displaying captured image/video on the screen
* */
private void previewMedia(boolean isImage) {
// Checking whether captured media is image or video
if (isImage) {
imgPreview.setVisibility(View.VISIBLE);
vidPreview.setVisibility(View.GONE);
// bimatp factory
BitmapFactory.Options options = new BitmapFactory.Options();
// down sizing image as it throws OutOfMemory Exception for larger
// images
options.inSampleSize = 8;
final Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
imgPreview.setImageBitmap(bitmap);
}
}
private void addImageView(LinearLayout layout) {
i = 0;
ImageView imageView = new ImageView(this);
imageView.setImageResource(R.drawable.ic_launcher);
imageView.setId(i);
layout.addView(imageView);
imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(UploadActivity.this,
MainActivity.class);
startActivity(intent);
}
});
}
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