{"id":2654,"date":"2023-07-07T14:53:09","date_gmt":"2023-07-07T06:53:09","guid":{"rendered":"https:\/\/www.zhidianwl.com\/zhidian\/?p=2654"},"modified":"2023-07-07T14:53:09","modified_gmt":"2023-07-07T06:53:09","slug":"app%e5%bc%80%e5%8f%91java%e4%bb%a3%e7%a0%81%e5%ae%9e%e4%be%8b%e6%9c%89%e4%bb%80%e4%b9%88%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.zhidianwl.com\/zhidian\/2023\/2654\/","title":{"rendered":"app\u5f00\u53d1java\u4ee3\u7801\u5b9e\u4f8b\u6709\u4ec0\u4e48\u7528\uff1f"},"content":{"rendered":"<p>Android\u662f\u4e00\u4e2a\u57fa\u4e8eJava\u8bed\u8a00\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u56e0\u6b64\u5f00\u53d1Android\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4f7f\u7528Java\u7f16\u7a0b\u8bed\u8a00\u548cAndroid SDK\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5c06\u4e3a\u60a8\u4ecb\u7ecd\u4e00\u4e9b\u5e38\u89c1\u7684Java\u4ee3\u7801\u5b9e\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u4e86\u89e3Android\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u7684\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n<p>1. \u58f0\u660e\u53d8\u91cf<\/p>\n<p>\u5728Java\u4e2d\uff0c\u58f0\u660e\u53d8\u91cf\u53ef\u4ee5\u4f7f\u7528\u5173\u952e\u5b57\u201cint\u201d\u3001\u201cString\u201d\u3001\u201cfloat\u201d\u6216\u5176\u4ed6\u6570\u636e\u7c7b\u578b\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>int age = 25;<\/p>\n<p>String name = &#8220;Tom&#8221;;<\/p>\n<p>float height = 1.75;<\/p>\n<p>&#8220;`<\/p>\n<p>2. \u8bfb\u53d6\u63a7\u4ef6<\/p>\n<p>\u5728\u5f00\u53d1Android\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528Java\u4ee3\u7801\u8bfb\u53d6\u5e03\u5c40\u6587\u4ef6\u4e2d\u7684\u63a7\u4ef6\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>TextView textView = (TextView) findViewById(R.id.text_message);<\/p>\n<p>&#8220;`<\/p>\n<p>\u5176\u4e2d\uff0c\u201cTextView\u201d\u662f\u63a7\u4ef6\u7c7b\u578b\uff0c\u201ctextView\u201d\u662f\u63a7\u4ef6\u540d\u79f0\uff0c\u201cR.id.text_message\u201d\u662f\u8d44\u6e90ID\u3002<\/p>\n<p>3. \u63a7\u4ef6\u4e8b\u4ef6\u5904\u7406<\/p>\n<p>\u5728Android\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7Java\u4ee3\u7801\u5904\u7406\u63a7\u4ef6\u7684\u4e8b\u4ef6\uff0c\u5982\u5355\u51fb\u4e8b\u4ef6\u3001\u957f\u6309\u4e8b\u4ef6\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>button.setOnClickListener(new View.OnClickListener() {<\/p>\n<p>    @Override<\/p>\n<p>    public void onClick(View v) {<\/p>\n<p>        \/\/ \u70b9\u51fb\u4e8b\u4ef6\u4ee3\u7801<\/p>\n<p>    }<\/p>\n<p>});<\/p>\n<p>&#8220;`<\/p>\n<p>\u5176\u4e2d\uff0c\u201cbutton\u201d\u662f\u63a7\u4ef6\u540d\u79f0\uff0c\u201csetOnClickListener\u201d\u662f\u8bbe\u7f6e\u5355\u51fb\u4e8b\u4ef6\u7684\u65b9\u6cd5\u3002<\/p>\n<p>4. \u6570\u636e\u5b58\u50a8<\/p>\n<p>\u5728Android\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Java\u4ee3\u7801\u5c06\u6570\u636e\u5b58\u50a8\u5728\u5185\u90e8\u5b58\u50a8\u5668\u6216\u5916\u90e8\u5b58\u50a8\u5668\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p>\u5185\u90e8\u5b58\u50a8\u5668\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>\/\/ \u5199\u5165\u6570\u636e<\/p>\n<p>FileOutputStream outputStream;<\/p>\n<p>try {<\/p>\n<p>    outputStream = openFileOutput(filename, Context.MODE_PRIVATE);<\/p>\n<p>    outputStream.write(string.getBytes());<\/p>\n<p>    outputStream.close();<\/p>\n<p>} catch (Exception e) {<\/p>\n<p>    e.printStackTrace();<\/p>\n<p>}<\/p>\n<p>\/\/ \u8bfb\u53d6\u6570\u636e<\/p>\n<p>FileInputStream inputStream;<\/p>\n<p>try {<\/p>\n<p>    inputStream = openFileInput(filename);<\/p>\n<p>    InputStreamReader inputStreamReader = new InputStreamReader(inputStream);<\/p>\n<p>    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);<\/p>\n<p>    StringBuilder stringBuilder = new StringBuilder();<\/p>\n<p>    String line = bufferedReader.readLine();<\/p>\n<p>    while (line != null) {<\/p>\n<p>        stringBuilder.append(line);<\/p>\n<p>        line = bufferedReader.readLine();<\/p>\n<p>    }<\/p>\n<p>    inputStream.close();<\/p>\n<p>    result = stringBuilder.toString();<\/p>\n<p>} catch (Exception e) {<\/p>\n<p>    e.printStackTrace();<\/p>\n<p>}<\/p>\n<p>&#8220;`<\/p>\n<p>\u5916\u90e8\u5b58\u50a8\u5668\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>\/\/ \u5199\u5165\u6570\u636e<\/p>\n<p>File file = new File(Environment.getExternalStorageDirectory(), filename);<\/p>\n<p>try {<\/p>\n<p>    FileOutputStream outputStream = new FileOutputStream(file);<\/p>\n<p>    outputStream.write(data.getBytes());<\/p>\n<p>    outputStream.close();<\/p>\n<p>} catch (Exception e) {<\/p>\n<p>    e.printStackTrace();<\/p>\n<p>}<\/p>\n<p>\/\/ \u8bfb\u53d6\u6570\u636e<\/p>\n<p>File file = new File(Environment.getExternalStorageDirectory(), filename);<\/p>\n<p>try {<\/p>\n<p>    FileInputStream inputStream = new FileInputStream(file);<\/p>\n<p>    InputStreamReader inputStreamReader = new InputStreamReader(inputSt<\/p>\n<p><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.cdn.yimenapp.com\/2023-03\/28\/14\/10865414731.jpg\" \/><\/figure>\n<\/p>\n<p>ream);<\/p>\n<p>    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);<\/p>\n<p>    StringBuilder stringBuilder = new StringBuilder();<\/p>\n<p>    String line = bufferedReader.readLine();<\/p>\n<p>    while (line != null) {<\/p>\n<p>        stringBuilder.append(line);<\/p>\n<p>        line = bufferedReader.readLine();<\/p>\n<p>    }<\/p>\n<p>    inputStream.close();<\/p>\n<p>    result = stringBuilder.toString();<\/p>\n<p>} catch (Exception e) {<\/p>\n<p>    e.printStackTrace();<\/p>\n<p>}<\/p>\n<p>&#8220;`<\/p>\n<p>5. \u7f51\u7edc\u8bf7\u6c42<\/p>\n<p>\u5728Android\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Java\u4ee3\u7801\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42\uff0c\u5904\u7406\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>public class MyAsyncTask extends AsyncTask {<\/p>\n<p><p>    protected String doInBackground(String&#8230; params) {<\/p>\n<p>        String result = &#8220;&#8221;;<\/p>\n<p>        try {<\/p>\n<p>            URL url = new URL(params[0]);<\/p>\n<p>            HttpURLConnection connection = (HttpURLConnection) url.openConnection();<\/p>\n<p>            connection.setRequestMethod(&#8220;GET&#8221;);<\/p>\n<p>            connection.<a href=\"https:\/\/www.yimenapp.com\/\">APP\u5f00\u53d1<\/a>setConnectTimeout(5000);<\/p>\n<p>            connection.setReadTimeout(5000);<\/p>\n<p>            connection.connect();<\/p>\n<p>            if (connection.ge<a href=\"https:\/\/www.yimenapp.com\/\">APP<\/a>tResponseCode() == HttpURLConnection.HTTP_OK) {<\/p>\n<p>                InputStream inputStream = connection.getInputStream();<\/p>\n<p>                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));<\/p>\n<p>                String line;<\/p>\n<p>                while ((line = bufferedReader.readLine()) != null) {<\/p>\n<p>                    result += line;<\/p>\n<p>                }<\/p>\n<p>                inputStream.close();<\/p>\n<p>            }<\/p>\n<p>            connection.disconnect();<\/p>\n<p>        } catch (Exception e) {<\/p>\n<p>            e.printStackTrace();<\/p>\n<p>        }<\/p>\n<p>        return result;<\/p>\n<p>    }<\/p>\n<p>    protected void onPostExecute(String result) {<\/p>\n<p>        \/\/ \u5904\u7406\u8fd4\u56de\u7684\u6570\u636e<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p>new MyAsyncTask().execute(url);<\/p>\n<p>&#8220;`<\/p>\n<p>\u5176\u4e2d\uff0c\u201curl\u201d\u662f\u8bf7\u6c42\u7684URL\u5730\u5740\u3002<\/p>\n<p>\u603b\u7ed3<\/p>\n<p>\u4ee5\u4e0a\u662f\u4e00\u4e9b\u5e38\u89c1\u7684Java\u4ee3\u7801\u5b9e\u4f8b\u3002\u5f53\u7136\uff0c\u8fd9\u53ea\u662fJava\u7f16\u7a0b\u7684\u5165\u95e8\u7ea7\u522b\uff0c\u5982\u679c\u60a8\u60f3\u6df1\u5165\u4e86\u89e3Java\u7f16\u7a0b\u8bed\u8a00\uff0c\u9700\u8981\u66f4\u591a\u7684\u5b66\u4e60\u548c\u5b9e\u8df5\u3002\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u80fd\u7ed9\u4f60\u63d0\u4f9b\u4e00\u4e2a\u826f\u597d\u7684\u5f00\u59cb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Android\u662f\u4e00\u4e2a\u57fa\u4e8eJava\u8bed\u8a00\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u56e0\u6b64\u5f00\u53d1Android\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4f7f\u7528Java\u7f16\u7a0b\u8bed\u8a00\u548cAndroid SDK\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5c06\u4e3a\u60a8\u4ecb\u7ecd\u4e00\u4e9b\u5e38\u89c1\u7684Java\u4ee3\u7801\u5b9e\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u4e86<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[81,5479,14,303,5478],"class_list":["post-2654","post","type-post","status-publish","format-standard","hentry","category-zuoapp","tag-81","tag-app","tag-14","tag-303","tag-exe"],"_links":{"self":[{"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/posts\/2654","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/comments?post=2654"}],"version-history":[{"count":0,"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/posts\/2654\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/media?parent=2654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/categories?post=2654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhidianwl.com\/zhidian\/wp-json\/wp\/v2\/tags?post=2654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}