Android WebView localStorage

Question

我正在尝试在Android WebView(Webkit,ChromeClient)中使用HTML5 localStorage示例.但是我没有运气.一切都来自手机浏览器,而不是WebView.

活动:

public class BrowserActivity extends Activity {
    @Override
    public final void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        WebView browser = (WebView) findViewById(R.id.webView);

        browser.setHapticFeedbackEnabled(true);        
        browser.getSettings().setJavaScriptEnabled(true);
        browser.getSettings().setSavePassword(false);

        browser.getSettings().setDatabaseEnabled(true);
        browser.getSettings().setDomStorageEnabled(true);
        browser.getSettings().setDatabasePath("/data/data/" + browser.getContext().getPackageName() + "/databases/");

        browser.loadUrl("http://my.app.com:10099");
    }
}

Manifiest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="RestrictedBrowser"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="16"/>
    <application android:label="@string/app_name">
        <activity android:name="RestrictedBrowser.BrowserActivity"
                  android:label="@string/app_name"
                  android:theme="@android:style/Theme.Black.NoTitleBar"
                  android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>
</manifest>

错误

WARN/System.err(3961):android.database.sqlite.SQLiteConstraintException:列packagename不唯一(代码19)07-12 13:57:43.425:WARN/System.err(3961):at android.database.sqlite .SQLiteConnection.nativeExecuteForChangedRowCount(Native Method)07-12 13:57:43.425:WARN/System.err(3961):at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:857)WARN/System.err(3961) ):在android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)WARN/System.err(3961):在android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)WARN/System.err (3961):在android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1665)WARN/System.err(3961):在android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594)ERROR/SQLiteLog (28735):( 14)无法打开文件[00bb9c9ce4] 07-12 13:57:47.005:ERROR/SQLiteLog(28735):( 14)os_unix.c:30241:(2)open(/ NotificationPermissions. db) - 0 7-12 DEBUG/WebKit(28735):无法从/NoificationPermissions.db加载SQLite数据库原因 - 无法打开数据库文件07-12 13:57:47.005:DEBUG/WebKit(28735):[28735:28758 D/WebKit ] external/webkit/Source/WebCore/platform/sql/SQLiteDatabase.cpp(71):bool WebCore :: SQLiteDatabase :: open(const WTF :: String&,bool)

Answer 1

必须先创建数据库目录,然后才能使用它.

使用以下代码

String databasePath = browser.getContext().getDir("databases", 
                                   Context.MODE_PRIVATE).getPath(); 
browser.getSettings().setDatabasePath(databasePath);