Android Google+;1按钮集成
我正在尝试在我的应用程序中实现Google+1按钮,但我在这一部分中遇到了以下错误:Android Google+;1按钮集成,android,google-plus,google-plus-one,Android,Google Plus,Google Plus One,我正在尝试在我的应用程序中实现Google+1按钮,但我在这一部分中遇到了以下错误: @Override protected void onStart() { super.onStart(); mPlusClient.connect(); } 在线: mPlusClient.connect(); 这是我的密码: public class Menu extends Activity implements OnClickListener,Conne
@Override
protected void onStart() {
super.onStart();
mPlusClient.connect();
}
在线:
mPlusClient.connect();
这是我的密码:
public class Menu extends Activity implements OnClickListener,ConnectionCallbacks,
OnConnectionFailedListener{
ImageButton exit;
private static final int REQUEST_CODE_RESOLVE_ERR = 9000;
private ProgressDialog mConnectionProgressDialog;
private PlusClient mPlusClient;
private ConnectionResult mConnectionResult;
private PlusOneButton mPlusOneButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
inicijalizujVars();
}
private void inicijalizujVars() {
exit = (ImageButton) findViewById(R.id.imageButtonExit);
mPlusOneButton = (PlusOneButton) findViewById(R.id.plus);
exit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
@Override
public void onResume(){
super.onResume();
mPlusClient = new PlusClient.Builder(this, this, this).clearScopes()
.build();
mPlusOneButton.initialize(mPlusClient,
"https://market.android.com/details?id=" + getPackageName(),
new OnPlusOneClickListener() {
@Override
public void onPlusOneClick(Intent intent) {
mPlusOneButton.setVisibility(View.INVISIBLE);
startActivityForResult(intent, 0);
}
});
startAppAd.onResume();
}
@Override
public void onBackPressed()
{
super.onBackPressed();
}
@Override
protected void onStart() {
super.onStart();
mPlusClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mPlusClient.disconnect();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (mConnectionProgressDialog.isShowing()) {
if (result.hasResolution()) {
try {
result.startResolutionForResult(this,
REQUEST_CODE_RESOLVE_ERR);
} catch (SendIntentException e) {
mPlusClient.connect();
}
}
}
mConnectionResult = result;
}
@Override
protected void onActivityResult(int requestCode, int responseCode,
Intent intent) {
if (requestCode == REQUEST_CODE_RESOLVE_ERR
&& responseCode == RESULT_OK) {
mConnectionResult = null;
mPlusClient.connect();
}
}
public void onDisconnected() {
}
public void onConnected() {
}
}
和logcat:
02-01 18:26:50.164: E/AndroidRuntime(2375): FATAL EXCEPTION: main
02-01 18:26:50.164: E/AndroidRuntime(2375): java.lang.RuntimeException: Unable to start activity ComponentInfo{us.candycrushsaga.candycrushsagacompleteguide/us.candycrushsaga.candycrushsagacompleteguide.Menu}: java.lang.NullPointerException
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.os.Handler.dispatchMessage(Handler.java:99)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.os.Looper.loop(Looper.java:137)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread.main(ActivityThread.java:4745)
02-01 18:26:50.164: E/AndroidRuntime(2375): at java.lang.reflect.Method.invokeNative(Native Method)
02-01 18:26:50.164: E/AndroidRuntime(2375): at java.lang.reflect.Method.invoke(Method.java:511)
02-01 18:26:50.164: E/AndroidRuntime(2375): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-01 18:26:50.164: E/AndroidRuntime(2375): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-01 18:26:50.164: E/AndroidRuntime(2375): at dalvik.system.NativeStart.main(Native Method)
02-01 18:26:50.164: E/AndroidRuntime(2375): Caused by: java.lang.NullPointerException
02-01 18:26:50.164: E/AndroidRuntime(2375): at us.candycrushsaga.candycrushsagacompleteguide.Menu.onStart(Menu.java:169)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.Activity.performStart(Activity.java:5018)
02-01 18:26:50.164: E/AndroidRuntime(2375): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
02-01 18:26:50.164: E/AndroidRuntime(2375): ... 11 more
查看活动的生命周期 onCreate-->onStart-->onResume-->OnPause-->onStopped-->onStopped-->OnStoryed 在
onStart
中调用mpluclient.connect()
,同时在onResume
中初始化它。因此,mpluclient
尚未初始化,导致NUllPointerException
因此,请确保在
mpluclient.connect()mpluclient
之前初始化mpluclient
为null,正确初始化它,因为调用onStart()
时,您尚未初始化mpluclient
,因此它是null
。您正在onResume()中初始化它,
其中。。。没道理,我错了。我将该代码重新定位到onCreate方法中,但现在在“public void onConnectionFailed”上出现错误。另外还有nullpointerexception。@marjanbaz可能会有帮助,这个和这个