在我的 android 应用程序中,数据必须使用 twitter 共享,所以按照这个链接http://androidcodeexamples.blogspot.in/2011/12/how-to-integrate-twitter-in-android.html,一切正常,但是提供用户名和密码后,获得强制关闭选项。这是 logcat 输出
01-17 17:07:54.118: E/AndroidRuntime(383): FATAL EXCEPTION: main
01-17 17:07:54.118: E/AndroidRuntime(383): java.lang.NullPointerException
01-17 17:07:54.118: E/AndroidRuntime(383): com.twitter.android.TwitterApp$1.handleMessage(TwitterApp.java:237)
01-17 17:07:54.118: E/AndroidRuntime(383): at android.os.Handler.dispatchMessage(Handler.java:99)
01-17 17:07:54.118: E/AndroidRuntime(383): at android.os.Looper.loop(Looper.java:123)
01-17 17:07:54.118: E/AndroidRuntime(383): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-17 17:07:54.118: E/AndroidRuntime(383): at java.lang.reflect.Method.invokeNative(Native Method)
01-17 17:07:54.118: E/AndroidRuntime(383): at java.lang.reflect.Method.invoke(Method.java:507)
01-17 17:07:54.118: E/AndroidRuntime(383): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-17 17:07:54.118: E/AndroidRuntime(383): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-17 17:07:54.118: E/AndroidRuntime(383): at dalvik.system.NativeStart.main(Native Method)
这是mainactivity中的代码
public class Singlemenuitem extends Activity {
private TwitterApp mTwitter;
private static final String CONSUMER_KEY = "6JyIkj71ZqG4wk3YF0Y4hw";
private static final String CONSUMER_SECRET = "sJl9aRVqlEt7nxlKvpMVK6tLULz5FSQ2KUOW0yie4";
private enum FROM {
TWITTER_POST, TWITTER_LOGIN
};
private enum MESSAGE {
SUCCESS, DUPLICATE, FAILED, CANCELLED
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_list_item);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
mTwitter = new TwitterApp(this, CONSUMER_KEY, CONSUMER_SECRET);
//share twitter
final ImageView twitter = (ImageView) findViewById(R.id.twitter);
twitter.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
mTwitter.resetAccessToken();
if (mTwitter.hasAccessToken() == true) {
try {
mTwitter.updateStatus(String.valueOf(Html
.fromHtml(TwitterApp.MESSAGE)));
// File f = new File("/mnt/sdcard/android.jpg");
// mTwitter.uploadPic(f, String.valueOf(Html
// .fromHtml(TwitterApp.MESSAGE)));
postAsToast(FROM.TWITTER_POST, MESSAGE.SUCCESS);
} catch (Exception e) {
if (e.getMessage().toString().contains("duplicate")) {
postAsToast(FROM.TWITTER_POST, MESSAGE.DUPLICATE);
}
e.printStackTrace();
}
mTwitter.resetAccessToken();
} else {
mTwitter.authorize();
}
}
private void postAsToast(FROM twitterPost, MESSAGE success) {
switch (twitterPost) {
case TWITTER_LOGIN:
switch (success) {
case SUCCESS:
Toast.makeText(Singlemenuitem.this, "Login Successful", Toast.LENGTH_LONG)
.show();
break;
case FAILED:
Toast.makeText(Singlemenuitem.this, "Login Failed", Toast.LENGTH_LONG).show();
default:
break;
}
break;
case TWITTER_POST:
switch (success) {
case SUCCESS:
Toast.makeText(Singlemenuitem.this, "Posted Successfully", Toast.LENGTH_LONG)
.show();
break;
case FAILED:
Toast.makeText(Singlemenuitem.this, "Posting Failed", Toast.LENGTH_LONG)
.show();
break;
case DUPLICATE:
Toast.makeText(Singlemenuitem.this,
"Posting Failed because of duplicate message...",
Toast.LENGTH_LONG).show();
default:
break;
}
break;
}
TwDialogListener mTwLoginDialogListener = new TwDialogListener() {
public void onError(String value) {
postAsToast(FROM.TWITTER_LOGIN, MESSAGE.FAILED);
Log.e("TWITTER", value);
mTwitter.resetAccessToken();
}
public void onComplete(String value) {
try {
mTwitter.updateStatus(TwitterApp.MESSAGE);
postAsToast(FROM.TWITTER_POST, MESSAGE.SUCCESS);
} catch (Exception e) {
if (e.getMessage().toString().contains("duplicate")) {
postAsToast(FROM.TWITTER_POST, MESSAGE.DUPLICATE);
}
e.printStackTrace();
}
mTwitter.resetAccessToken();
}