如何在Android WebView中獲取當前位置?
此示例演示如何在Android WebView中獲取當前位置。
步驟1 - 在Android Studio中建立一個新專案,轉到檔案 ⇒ 新建專案,並填寫所有必需的詳細資訊以建立新專案。
步驟2 - 將以下程式碼新增到res/layout/activity_main.xml。
<?xml version = "1.0" encoding = "utf-8"?> <LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:app = "http://schemas.android.com/apk/res-auto" xmlns:tools = "http://schemas.android.com/tools" android:layout_width = "match_parent" android:gravity = "center" android:layout_height = "match_parent" tools:context = ".MainActivity" android:orientation = "vertical"> <WebView android:id = "@+id/web_view" android:layout_width = "match_parent" android:layout_height = "match_parent" /> </LinearLayout>
在上面的程式碼中,我們使用了WebView來顯示mylocation.org。
步驟3 - 將以下程式碼新增到src/MainActivity.java
package com.example.myapplication; import android.app.ProgressDialog; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.widget.EditText; public class MainActivity extends AppCompatActivity { @RequiresApi(api = Build.VERSION_CODES.P) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final ProgressDialog progressDialog = new ProgressDialog(this); progressDialog.setMessage("Loading Data..."); progressDialog.setCancelable(false); WebView web_view = findViewById(R.id.web_view); web_view.requestFocus(); web_view.getSettings().setLightTouchEnabled(true); web_view.getSettings().setJavaScriptEnabled(true); web_view.getSettings().setGeolocationEnabled(true); web_view.loadUrl("https://mylocation.org/"); web_view.setWebChromeClient(new WebChromeClient() { public void onProgressChanged(WebView view, int progress) { if (progress < 100) { progressDialog.show(); } if (progress = = 100) { progressDialog.dismiss(); } } }); } }
步驟4 - 將以下程式碼新增到AndroidManifest.xml
<?xml version = "1.0" encoding = "utf-8"?> <manifest xmlns:android = "http://schemas.android.com/apk/res/android" package = "com.example.myapplication"> <uses-permission android:name = "android.permission.INTERNET"/> <application android:allowBackup = "true" android:icon = "@mipmap/ic_launcher" android:label = "@string/app_name" android:roundIcon = "@mipmap/ic_launcher_round" android:supportsRtl = "true" android:theme = "@style/AppTheme"> <activity android:name = ".MainActivity"> <intent-filter> <action android:name = "android.intent.action.MAIN" /> <category android:name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
讓我們嘗試執行您的應用程式。我假設您已將您的實際Android移動裝置連線到您的計算機。要在Android Studio中執行該應用程式,請開啟您專案的其中一個活動檔案,然後單擊執行 工具欄中的圖示。選擇您的移動裝置作為選項,然後檢查您的移動裝置,它將顯示您的預設螢幕 -
點選 這裡 下載專案程式碼
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