From bd7136545d27fcf4e31128f7b83a2101c618f27e Mon Sep 17 00:00:00 2001 From: aNaN9811 <1206393146@qq.com> Date: Sat, 20 Apr 2019 20:48:06 +0800 Subject: [PATCH] #7 shiyan7 --- students/soft1714080902206/App.java | 35 -- .../soft1714080902206/ContentHandler.java | 62 ---- students/soft1714080902206/MainActivity.java | 314 ++++++++---------- students/soft1714080902206/activity_main.xml | 20 +- students/soft1714080902206/get_data.json | 3 - students/soft1714080902206/get_data.xml | 17 - 6 files changed, 157 insertions(+), 294 deletions(-) delete mode 100644 students/soft1714080902206/App.java delete mode 100644 students/soft1714080902206/ContentHandler.java delete mode 100644 students/soft1714080902206/get_data.json delete mode 100644 students/soft1714080902206/get_data.xml diff --git a/students/soft1714080902206/App.java b/students/soft1714080902206/App.java deleted file mode 100644 index 3e20f5e01..000000000 --- a/students/soft1714080902206/App.java +++ /dev/null @@ -1,35 +0,0 @@ -package com.example.networktest; - -public class App { - - private String id; - - private String name; - - private String version; - - public String getId() { - return id; - } - - public void setId(String id) { - this.id = id; - } - - public String getName() { - return name; - } - - public void setName(String name) { - this.name = name; - } - - public String getVersion() { - return version; - } - - public void setVersion(String version) { - this.version = version; - } - -} diff --git a/students/soft1714080902206/ContentHandler.java b/students/soft1714080902206/ContentHandler.java deleted file mode 100644 index a5fd8ff25..000000000 --- a/students/soft1714080902206/ContentHandler.java +++ /dev/null @@ -1,62 +0,0 @@ -package com.example.networktest; - -import android.util.Log; - -import org.xml.sax.Attributes; -import org.xml.sax.SAXException; -import org.xml.sax.helpers.DefaultHandler; - -public class ContentHandler extends DefaultHandler { - - private String nodeName; - - private StringBuilder id; - - private StringBuilder name; - - private StringBuilder version; - - @Override - public void startDocument() throws SAXException { - id = new StringBuilder(); - name = new StringBuilder(); - version = new StringBuilder(); - } - - @Override - public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { - //记录当前节点名 - nodeName = localName; - } - - @Override - public void characters(char[] ch, int start, int length) throws SAXException { - //根据当前的节点名判断将内容添加到哪一个 StringBuilder 对象中 - if ("id".equals(nodeName)) { - id.append(ch, start, length); - } else if ("name".equals(nodeName)) { - name.append(ch, start, length); - } else if ("version".equals(nodeName)) { - version.append(ch, start, length); - } - } - - @Override - public void endElement(String uri, String localName, String qName) throws SAXException { - if ("app".equals(localName)) { - Log.d("ContentHandler", "id is " + id.toString().trim()); - Log.d("ContentHandler", "name is " + name.toString().trim()); - Log.d("ContentHandler", "version is " + version.toString().trim()); - //最后将 StringBuilder 清空掉 - id.setLength(0); - name.setLength(0); - version.setLength(0); - } - } - - @Override - public void endDocument() throws SAXException { - super.endDocument(); - } - -} diff --git a/students/soft1714080902206/MainActivity.java b/students/soft1714080902206/MainActivity.java index ef1569988..e4e7d3038 100644 --- a/students/soft1714080902206/MainActivity.java +++ b/students/soft1714080902206/MainActivity.java @@ -1,208 +1,186 @@ -package com.example.networktest; - +package com.example.cameraalbumtest; + +import android.Manifest; +import android.annotation.TargetApi; +import android.content.ContentUris; +import android.content.Intent; +import android.content.IntentFilter; +import android.content.pm.PackageManager; +import android.database.Cursor; +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.net.Uri; +import android.os.Build; +import android.provider.DocumentsContract; +import android.provider.MediaStore; +import android.support.v4.app.ActivityCompat; +import android.support.v4.content.ContextCompat; +import android.support.v4.content.FileProvider; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; -import android.util.Log; import android.view.View; import android.widget.Button; -import android.widget.TextView; - -import com.google.gson.Gson; -import com.google.gson.reflect.TypeToken; - -import org.json.JSONArray; -import org.json.JSONObject; -import org.xml.sax.InputSource; -import org.xml.sax.XMLReader; -import org.xmlpull.v1.XmlPullParser; -import org.xmlpull.v1.XmlPullParserFactory; +import android.widget.ImageView; +import android.widget.Toast; -import java.io.BufferedReader; +import java.io.File; +import java.io.FileNotFoundException; import java.io.IOException; -import java.io.InputStream; -import java.io.InputStreamReader; -import java.io.StringReader; -import java.net.HttpURLConnection; -import java.net.URL; -import java.util.List; -import javax.xml.parsers.SAXParserFactory; +public class MainActivity extends AppCompatActivity { -import okhttp3.OkHttpClient; -import okhttp3.Request; -import okhttp3.Response; + private static final int TAKE_PHOTO = 1; -public class MainActivity extends AppCompatActivity implements View.OnClickListener { + private static final int CHOOSE_PHOTO = 2; - TextView responseText; + private ImageView picture; + + private Uri imageUri; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); - Button sendRequest = findViewById(R.id.send_request); - responseText = findViewById(R.id.response_text); - sendRequest.setOnClickListener(this); - } - - @Override - public void onClick(View v) { - if (v.getId() == R.id.send_request) { - sendRequestWithOkHttp(); - } - } - - private void sendRequestWithOkHttp() { - new Thread(new Runnable() { + Button takePhoto = (Button) findViewById(R.id.take_photo); + Button chooseFromAlbum = (Button) findViewById(R.id.chosse_from_album); + picture = (ImageView) findViewById(R.id.picture); + takePhoto.setOnClickListener(new View.OnClickListener() { @Override - public void run() { + public void onClick(View v) { + //创建 File 对象，用于存储拍照后的图片 + File outputImage = new File(getExternalCacheDir(), "output_image.jpg"); try { - OkHttpClient client = new OkHttpClient(); - Request request = new Request.Builder() - //指定访问的服务器地址是电脑本机 - .url("http://10.0.2.2/get_data.json") - .build(); - Response response = client.newCall(request).execute(); - String responseData = response.body().string(); - parseJSONWithJSON(responseData); - } catch (Exception e) { + if (outputImage.exists()) { + outputImage.delete(); + } + outputImage.createNewFile(); + } catch (IOException e) { e.printStackTrace(); } + if (Build.VERSION.SDK_INT >= 24) { + imageUri = FileProvider.getUriForFile(MainActivity.this, "com.example.cameraalbumtest.fileprovider", outputImage); + } else { + imageUri = Uri.fromFile(outputImage); + } + //启动相机程序 + Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); + intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); + startActivityForResult(intent, TAKE_PHOTO); } - }).start(); - } - - private void parseJSONWithJSON(String jsonData) { - Gson gson = new Gson(); - List appList = gson.fromJson(jsonData, new TypeToken>(){}.getType()); - for (App app : appList) { - Log.d("MainActivity", "id is " + app.getId()); - Log.d("MainActivity", "name is " + app.getName()); - Log.d("MainActivity", "version is " + app.getVersion()); - } + }); + chooseFromAlbum.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View v) { + if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { + ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); + } else { + openAlbum(); + } + } + }); } - private void parseJSONWithJSONObject(String jsonData) { - try { - JSONArray jsonArray = new JSONArray(jsonData); - for (int i = 0; i < jsonArray.length(); i++) { - JSONObject jsonObject =jsonArray.getJSONObject(i); - String id = jsonObject.getString("id"); - String name = jsonObject.getString("name"); - String version = jsonObject.getString("version"); - Log.d("MainActivity", "id is " + id); - Log.d("MainActivity", "name is " + name); - Log.d("MainActivity", "version is " + version); - } - } catch (Exception e) { - e.printStackTrace(); - } + private void openAlbum() { + Intent intent = new Intent("android.intent.action.GET_CONTENT"); + intent.setType("image/*"); + startActivityForResult(intent, CHOOSE_PHOTO); //打开相册 } - private void parseXMLWithSAX(String xmlData) { - try { - SAXParserFactory factory = SAXParserFactory.newInstance(); - XMLReader xmlReader = factory.newSAXParser().getXMLReader(); - ContentHandler handler = new ContentHandler(); - //将 ContentHandler 的实例设置到 XMLReader 中 - xmlReader.setContentHandler(handler); - //开始执行解析 - xmlReader.parse(new InputSource(new StringReader(xmlData))); - } catch (Exception e) { - e.printStackTrace(); + @Override + public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { + switch (requestCode) { + case 1: + if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { + openAlbum(); + } else { + Toast.makeText(this, "You denied the peimission", Toast.LENGTH_SHORT).show(); + } + break; + default: } } - private void parseXMLWithPull(String xmlData) { - try { - XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); - XmlPullParser xmlPullParser = factory.newPullParser(); - xmlPullParser.setInput(new StringReader(xmlData)); - int eventType = xmlPullParser.getEventType(); - String id = ""; - String name = ""; - String version =""; - while (eventType != XmlPullParser.END_DOCUMENT) { - String nodeName = xmlPullParser.getName(); - switch (eventType) { - //开始解析某个节点 - case XmlPullParser.START_TAG: { - if ("id".equals(nodeName)) { - id = xmlPullParser.nextText(); - } else if ("name".equals(nodeName)) { - name = xmlPullParser.nextText(); - } else if ("version".equals(nodeName)) { - version = xmlPullParser.nextText(); - } - break; + @Override + protected void onActivityResult (int requestCode, int resultCode, Intent data) { + switch (requestCode) { + case TAKE_PHOTO: + if (resultCode == RESULT_OK) { + try { + //将拍摄的照片显示出来 + Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri)); + picture.setImageBitmap(bitmap); + } catch (FileNotFoundException e) { + e.printStackTrace(); } - //完成解析某个节点 - case XmlPullParser.END_TAG: { - if ("app".equals(nodeName)) { - Log.d("MainActivity", "id is " + id); - Log.d("MainActivity", "name is " + name); - Log.d("MainActivity", "version is " + version); - } - break; + } + break; + case CHOOSE_PHOTO: + if (resultCode == RESULT_OK) { + //判断手机系统版本号 + if (Build.VERSION.SDK_INT >= 19) { + //4.4 及以上系统石永红这个方法处理图片 + handleImageOnKitKat(data); + } else { + //4.4 以下系统使用这个该方法处理图片 + handleImageBeforeKitKat(data); } - default: - break; } - eventType = xmlPullParser.next(); - } - } catch (Exception e) { - e.printStackTrace(); + default: + break; } } - private void sendRequestWithHttpURLConnection() { - //开启线程来发起网络请求 - new Thread(new Runnable() { - @Override - public void run() { - HttpURLConnection connection = null; - BufferedReader reader = null; - try { - URL url = new URL("https://www.baidu.com"); - connection = (HttpURLConnection) url.openConnection(); - connection.setRequestMethod("GET"); - connection.setConnectTimeout(8000); - connection.setReadTimeout(8000); - InputStream in = connection.getInputStream(); - //下面对获取到的输入流进行读取 - reader = new BufferedReader(new InputStreamReader(in)); - StringBuilder response = new StringBuilder(); - String line; - while ((line = reader.readLine()) != null) { - response.append(line); - } - showResponse(response.toString()); - } catch (Exception e) { - e.printStackTrace(); - } finally { - if (reader != null) { - try { - reader.close(); - } catch (IOException e) { - e.printStackTrace(); - } - } - if (connection != null) { - connection.disconnect(); - } - } + @TargetApi(19) + private void handleImageOnKitKat(Intent data) { + String imagePath = null; + Uri uri = data.getData(); + if (DocumentsContract.isDocumentUri(this, uri)) { + String docId = DocumentsContract.getDocumentId(uri); + //如果是 document 类型的 Uri，那就取出 document id 进行处理 + if ("com.android.providers.media.documents".equals(uri.getAuthority())) { + String id = docId.split(":")[1]; + String selection = MediaStore.Images.Media._ID + "=" + id; + imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection); + } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())){ + Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId)); + imagePath = getImagePath(contentUri, null); } - }).start(); + } else if ("file".equalsIgnoreCase(uri.getScheme())) { + //如果是 content 类型的 Uri ，则使用普通方式处理 + imagePath = getImagePath(uri, null); + } else if ("file".equalsIgnoreCase(uri.getScheme())) { + //如果是 file 类型的 Uri ，直接获取图片路径即可 + imagePath = uri.getPath(); + } + displayImage(imagePath); //根据图片路径显示图片 } - private void showResponse(final String response) { - runOnUiThread(new Runnable() { - @Override - public void run() { - //在这里进行 UI 操作，将结果显示到界面上 - responseText.setText(response); + private void handleImageBeforeKitKat(Intent data) { + Uri uri = data.getData(); + String imagePath = getImagePath(uri, null); + displayImage(imagePath); + } + + private String getImagePath(Uri uri, String selection) { + String path = null; + //通过 Uri 和 selection 来获取真实的图片路径 + Cursor cursor = getContentResolver().query(uri, null, selection, null, null); + if (cursor != null) { + if (cursor.moveToFirst()) { + path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)); } - }); + cursor.close(); + } + return path; + } + + private void displayImage(String imagePath) { + if (imagePath != null) { + Bitmap bitmap = BitmapFactory.decodeFile(imagePath); + picture.setImageBitmap(bitmap); + } else { + Toast.makeText(this, "failed to get image", Toast.LENGTH_SHORT).show(); + } } } diff --git a/students/soft1714080902206/activity_main.xml b/students/soft1714080902206/activity_main.xml index ba32d18d4..8fc93fd46 100644 --- a/students/soft1714080902206/activity_main.xml +++ b/students/soft1714080902206/activity_main.xml @@ -5,19 +5,21 @@ android:layout_height="match_parent">