onPagefinished的Android的WebView函数被调用两次 [英] android webview function onPagefinished is called twice
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问题描述
我的Android的WebView功能 onPageFinished
被调用了两次。我不知道为什么,但它运作良好,在Android 2.2,但是当我升级到4+它不工作。 code连接下面
code
@覆盖
公共无效onPageFinished(的WebView视图,字符串URL){
如果(url.startsWith(MobileConstants.PUSHPIN_CALLBACK_URL)){
如果(url.indexOf(code =)!= - 1){ 字符串code = url.substring(url.indexOf(code =)+ 5);
Log.i(code,code);
如果(code =空&安培;!&安培;!code.equals()){
view.setVisibility(View.GONE);
令牌的accessToken = service.getAccessToken(空,新的验证(code));
Log.i(的access_token,accessToken.getToken());
共享preferences设置= getShared preferences(的access_token,0);
共享preferences.Editor编辑= settings.edit();
如果(accessToken.getToken()!= NULL)
editor.putString(的access_token,accessToken.getToken());
意图MAP3 =新意图(OAuthAccessTokenActivity.this,Dashboard.class); map3.putExtra(的access_token,accessToken.getToken());
startActivity(MAP3);
}
}否则如果(!url.indexOf(错误=)= - 1){
view.setVisibility(View.INVISIBLE); } }
的System.out.println(onPageFinished:+网址); }
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07-22 14:29:50.523:E / AndroidRuntime(1186):致命异常:主要
07-22 14:29:50.523:E / AndroidRuntime(1186):显示java.lang.NullPointerException
07-22 14:29:50.523:E / AndroidRuntime(1186):在com.facebook.android.OAuthAccessTokenActivity $ 1.onPageFinished(OAuthAccessTokenActivity.java:83)
07-22 14:29:50.523:E / AndroidRuntime(1186):在android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:327)
07-22 14:29:50.523:E / AndroidRuntime(1186):在android.os.Handler.dispatchMessage(Handler.java:99)
07-22 14:29:50.523:E / AndroidRuntime(1186):在android.os.Looper.loop(Looper.java:137)
07-22 14:29:50.523:E / AndroidRuntime(1186):在android.app.ActivityThread.main(ActivityThread.java:4745)
07-22 14:29:50.523:E / AndroidRuntime(1186):在java.lang.reflect.Method.invokeNative(本机方法)
07-22 14:29:50.523:E / AndroidRuntime(1186):在java.lang.reflect.Method.invoke(Method.java:511)
07-22 14:29:50.523:E / AndroidRuntime(1186):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:786)
07-22 14:29:50.523:E / AndroidRuntime(1186):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-22 14:29:50.523:E / AndroidRuntime(1186):在dalvik.system.NativeStart.main(本机方法)
解决方案
我从onPageFinished这个功能移动code解决这个问题。
code
@覆盖
公共布尔shouldOverrideUrlLoading(的WebView视图,字符串URL){ 如果(url.startsWith(MobileConstants.CALLBACK_URL)){
如果(url.indexOf(code =)!= -1){ 字符串code = url.substring(url.indexOf(code =)+ 5);
Log.i(code,code);
如果(code =空&安培;!&安培;!code.equals()){
view.setVisibility(View.GONE);
令牌的accessToken = service.getAccessToken(空,新的验证(code));
Log.i(的access_token,accessToken.getToken());
共享preferences设置= getShared preferences(的access_token,0);
共享preferences.Editor编辑= settings.edit();
如果(accessToken.getToken()!= NULL)
editor.putString(的access_token,accessToken.getToken()); 访问= accessToken.getToken(); 意图MAP3 =新意图(OAuthAccessTokenActivity.this,Dashboard.class); map3.putExtra(的access_token,accessToken.getToken());
startActivity(MAP3);
返回true;
}
}否则如果(!url.indexOf(错误=)= - 1){
view.setVisibility(View.INVISIBLE);
返回false;
} }
的System.out.println(onPageFinished:+网址); 返回super.shouldOverrideUrlLoading(查看,网址); }
My android webview function onPageFinished
is called twice. I don't know why, but it works well on android 2.2 but when I upgrade it to 4+ it does not works. Code is attached below
Code
@Override
public void onPageFinished(WebView view, String url) {
if (url.startsWith(MobileConstants.PUSHPIN_CALLBACK_URL)) {
if (url.indexOf("code=")!=-1) {
String code = url.substring(url.indexOf("code=")+5);
Log.i ("code", code);
if (code != null && !code.equals("") ){
view.setVisibility(View.GONE);
Token accessToken = service.getAccessToken(null, new Verifier(code));
Log.i("access_token",accessToken.getToken());
SharedPreferences settings = getSharedPreferences("access_token" , 0);
SharedPreferences.Editor editor = settings.edit();
if(accessToken.getToken() != null)
editor.putString("access_token", accessToken.getToken() );
Intent map3 = new Intent(OAuthAccessTokenActivity.this, Dashboard.class);
map3.putExtra("access_token", accessToken.getToken());
startActivity(map3);
}
} else if (url.indexOf("error=")!=-1) {
view.setVisibility(View.INVISIBLE);
}
}
System.out.println("onPageFinished : " + url);
}
Log
07-22 14:29:50.523: E/AndroidRuntime(1186): FATAL EXCEPTION: main
07-22 14:29:50.523: E/AndroidRuntime(1186): java.lang.NullPointerException
07-22 14:29:50.523: E/AndroidRuntime(1186): at com.facebook.android.OAuthAccessTokenActivity$1.onPageFinished(OAuthAccessTokenActivity.java:83)
07-22 14:29:50.523: E/AndroidRuntime(1186): at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:327)
07-22 14:29:50.523: E/AndroidRuntime(1186): at android.os.Handler.dispatchMessage(Handler.java:99)
07-22 14:29:50.523: E/AndroidRuntime(1186): at android.os.Looper.loop(Looper.java:137)
07-22 14:29:50.523: E/AndroidRuntime(1186): at android.app.ActivityThread.main(ActivityThread.java:4745)
07-22 14:29:50.523: E/AndroidRuntime(1186): at java.lang.reflect.Method.invokeNative(Native Method)
07-22 14:29:50.523: E/AndroidRuntime(1186): at java.lang.reflect.Method.invoke(Method.java:511)
07-22 14:29:50.523: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-22 14:29:50.523: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-22 14:29:50.523: E/AndroidRuntime(1186): at dalvik.system.NativeStart.main(Native Method)
解决方案
I solved the issue by moving the code from onPageFinished to this Function
Code
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url){
if (url.startsWith(MobileConstants.CALLBACK_URL)) {
if (url.indexOf("code=") != -1) {
String code = url.substring(url.indexOf("code=")+5);
Log.i ("code", code);
if (code != null && !code.equals("") ){
view.setVisibility(View.GONE);
Token accessToken = service.getAccessToken(null, new Verifier(code));
Log.i("access_token",accessToken.getToken());
SharedPreferences settings = getSharedPreferences("access_token" , 0);
SharedPreferences.Editor editor = settings.edit();
if(accessToken.getToken() != null)
editor.putString("access_token", accessToken.getToken() );
access = accessToken.getToken();
Intent map3 = new Intent(OAuthAccessTokenActivity.this, Dashboard.class);
map3.putExtra("access_token", accessToken.getToken());
startActivity(map3);
return true;
}
} else if (url.indexOf("error=")!=-1) {
view.setVisibility(View.INVISIBLE);
return false;
}
}
System.out.println("onPageFinished : " + url);
return super.shouldOverrideUrlLoading(view, url);
}
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