一次闪屏

Question

我希望我的启动画面只在第一次启动时显示。我知道我必须通过共享偏好，但如何？这是我的标语：

public class Splash extends Activity {

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.splash);

        //animation
        ImageView imageView = (ImageView) findViewById(R.id.imageView);
        Animation alpha = AnimationUtils.loadAnimation(getApplicationContext(),
                R.anim.fade_in);
        imageView.startAnimation(alpha);
        alpha.setAnimationListener((new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
                // TODO Auto-generated method stub
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
                // TODO Auto-generated method stub
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                // TODO Start your activity here.
                Intent mainIntent = new Intent(Splash.this, MainActivity.class);
                Splash.this.startActivity(mainIntent);
                Splash.this.finish();
            }
        }));
    }
}

Answer 1

试试这个：

SharedPreferences mPrefs;
final boolean mLoginSession;
 public static final String PREFER_NAME = "MyPrefsFile";

//Inside onCreate
   mPrefs = getSharedPreferences(PREFER_NAME, MODE_PRIVATE);
  mLoginSession = mPrefs.getBoolean(PREFER_NAME, false);



if (mLoginSession) {
    Intent gotoMain = new Intent(Splash.this, MainActivity.class);
     startActivity(gotoMain);
     finish();
     } else {
      //Show Splash Data here and Change the shared value of "PREFER_NAME"

      SharedPreferences.Editor editor = mPrefs.edit();
            editor.putBoolean(PREFER_NAME, true);
            editor.commit();
      }

Answer 2

这样试试。

public class Splash extends Activity {

    SharedPreferences sharedpreferences;
    boolean splash;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        sharedpreferences = getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
        splash = sharedpreferences.getBoolean("Splash", false);
        if (splash == true) {
            Intent mainIntent = new Intent(Splash.this, MainActivity.class);
            startActivity(mainIntent);
        }
        else
        {
            setContentView(R.layout.splash);

            //animation
            ImageView imageView = (ImageView) findViewById(R.id.imageView);
            Animation alpha = AnimationUtils.loadAnimation(getApplicationContext(),
                    R.anim.fade_in);

            imageView.startAnimation(alpha);

            alpha.setAnimationListener((new Animation.AnimationListener() {
                @Override
                public void onAnimationStart(Animation animation) {
                    // TODO Auto-generated method stub
                }

                @Override
                public void onAnimationRepeat(Animation animation) {
                    // TODO Auto-generated method stub
                }

                @Override
                public void onAnimationEnd(Animation animation) {
                    // TODO Start your activity here.
                    SharedPreferences.Editor editor = sharedpreferences.edit();
                    editor.putBoolean("Splash", true);
                    Intent mainIntent = new Intent(Splash.this, MainActivity.class);
                    Splash.this.startActivity(mainIntent);
                    Splash.this.finish();
                }
            }));
        }
    }
}

一次闪屏

one time splash screen

android

splash-screen

sharedpreferences