如何在Android中显示WebView
我有一个二维码扫描仪,然后我有一个If-else语句,我想在If语句为真时显示Webview,但web视图仍然显示并阻止摄影机视图。我怎么做如何在Android中显示WebView,android,webview,Android,Webview,我有一个二维码扫描仪,然后我有一个If-else语句,我想在If语句为真时显示Webview,但web视图仍然显示并阻止摄影机视图。我怎么做 PreviewCallback previewCb = new PreviewCallback() { public void onPreviewFrame(byte[] data, Camera camera) { Camera.Parameters parameters = camera.getPa
PreviewCallback previewCb = new PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Size size = parameters.getPreviewSize();
Image barcode = new Image(size.width, size.height, "Y800");
barcode.setData(data);
int result = scanner.scanImage(barcode);
if (result != 0) {
previewing = false;
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
SymbolSet syms = scanner.getResults();
WebView engine = (WebView) findViewById(R.id.web_engine);
engine.removeAllViews();
for (Symbol sym : syms) {
String value = new String( sym.getData());
if(value.startsWith("http://192.168.74.1")){
scanText.setText("QR Code result: " + value);
barcodeScanned = true;
engine.setVisibility(View.VISIBLE);
engine.loadUrl(value);
}
else {
scanText.setText("QR Code result 2: " + value);
barcodeScanned = true;
engine.setVisibility(View.GONE);
}
TextView tv = (TextView) findViewById(R.id.scanText);
tv.setMovementMethod(LinkMovementMethod.getInstance());
}
}
}
};
试试这个
SymbolSet syms = scanner.getResults();
WebView engine = (WebView) findViewById(R.id.web_engine);
for (Symbol sym : syms) {
String value = new String( sym.getData());
if(value.startsWith("http://192.168.74.1")){
scanText.setText("QR Code result: " + value);
barcodeScanned = true;
engine.setVisibility(View.VISIBLE);
engine.loadUrl(value);
}
else {
scanText.setText("QR Code result 2: " + value);
barcodeScanned = true;
engine.setVisibility(View.INVISIBLE);
}
TextView tv = (TextView) findViewById(R.id.scanText);
tv.setMovementMethod(LinkMovementMethod.getInstance());
}
创建两个Android布局文件-“res/layout/main.xml”和“res/layout/webview.xml” 文件:res/layout/main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/buttonUrl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go to http://www.google.com" />
</LinearLayout>
文件:WebViewActivity.java
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
private Button button;
public void onCreate(Bundle savedInstanceState) {
final Context context = this;
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button) findViewById(R.id.buttonUrl);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(context, WebViewActivity.class);
startActivity(intent);
}
});
}
}
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
public class WebViewActivity extends Activity {
private WebView webView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://www.google.com");
}
}
文件:AndroidManifest.xml–请参阅完整示例
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mkyong.android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".WebViewActivity"
android:theme="@android:style/Theme.NoTitleBar" />
<activity
android:label="@string/app_name"
android:name=".MainActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
第一:请不要在循环中执行此操作。第二:如果希望WebView不再显示在else
语句中,只需通过引擎.setVisibility(View.GONE)
禁用它;尝试引擎.setVisibility(View.GONE);而不是…View.INVISIBLE?如何将url传递到webviewactivity.java?url是我发布的代码中的字符串值?如何传递存储在变量值中的url?该值来自扫描的二维码。我在另一个android项目中尝试了该代码。当我按下按钮时,应用程序停止。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mkyong.android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".WebViewActivity"
android:theme="@android:style/Theme.NoTitleBar" />
<activity
android:label="@string/app_name"
android:name=".MainActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>