[SDK] mTencent Tencent android's always instantiation fails, you big God rookie neighborhoods! ! !

            
Download the SDK Tencent did not fully understand, leading to not use = _ =! Hey rookie did not save it

Run the following code when prompted mTencent class instantiation always fail (ie always throws NullPointer exception);
I think it is Tencent.createInstance (APP_ID, this.getApplicationContext ()); the parameters wrong. But do not understand the second parameter write so right, global Context is this? It is best to have a simple Demo for reference, Tencent's too messy.
This third party login class project in a separate Activity, Global Context does not count the total framework of project drawings
behind

 public class QQSinaLogin extends Activity implements OnClickListener {
Button QQloginBtn, SinaloginBtn; 

public static Tencent mTencent; 
private static final String APP_ID = "100489529"; 
private static final String SCOPE = "get_user_info, get_simple_userinfo, add_share" ;/ / permissions: read user information and share information 

protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); 
setContentView (R.layout.qqsinalogin); 
/ * 
* Class SDK references Tencent open access OpenAPI, 
* @ Param1 - APP_ID, 
* @ Param2 - Global Context 
 application* / 
mTencent = Tencent.createInstance (APP_ID, this.getApplicationContext ()); 

QQloginBtn = (Button) findViewById (R.id.QQlogin); 
SinaloginBtn = (Button) findViewById (R.id.Weibologin); 

QQloginBtn.setOnClickListener (this); 
} 

@ Override 
public void onClick (View v) {
switch (v.getId ()) {
case R.id.QQlogin: 
onClickLogin (); 
break; 
} 
} 

private void onClickLogin () {
if (! mTencent.isSessionValid ()) {
IUiListener listener = new BaseUiListener () {
@ Override 
protected void doComplete (JSONObject values) {

/ / TODO: Login successful some processing 
} 
}; 
mTencent.login (this, SCOPE, listener); 
} Else {
mTencent.logout (this); 
} 
} 

private class BaseUiListener implements IUiListener {
@ Override 
public void onComplete (JSONObject response) {
doComplete (response); 
} 

protected void doComplete (JSONObject values) {} 
@ Override 
public void onError (UiError e) {} 
@ Override 
public void onCancel () {} 
} 

public boolean onKeyDown (int keyCode, KeyEvent event) {/ / Return key to return to Homepage 
if (keyCode == KeyEvent.KEYCODE_BACK 
&& Event.getAction () == KeyEvent.ACTION_DOWN) {
Intent intent = new Intent (QQSinaLogin.this, Homepage.class); 
startActivity (intent); 
overridePendingTransition (R.anim.translate_left_enter, 
R.anim.holding_anima); / / set the new Activity Activity enter and exit the current animation. 
this.finish (); 
return true; 
} 
return super.onKeyDown (keyCode, event); 
} 
} 

Framework of the project the following diagram:


Third-party login screen as follows:

Reply:
Add
in the AndroidManifest
android: name = "com.tencent.tauth.AuthActivity"
android: noHistory = "true"
android: launchMode = "singleTask">