動畫重新啓動Android的活動

後不顯示我會盡我所能來解釋我的問題沒有視頻動畫重新啓動Android的活動

我有一個登錄活動，其中在成功登錄，並的EditText按鈕領域淡出了「日誌」 TextView淡入（使用Facebook Shimmer）。這工作很棒！但是，成功登錄後，我們會收到一個空白的活動（仍然正常）。現在，我覆蓋了後退按鈕，這樣當後退按鈕被按下時，用戶被迫再次登錄。我的問題出現在此時用戶點擊登錄按鈕。編輯文本和按鈕元素很好地淡出，但「登錄」TextView永遠不會淡入。

下面是一些圖片示例。我還會發布LoginActivity.class的源代碼，如果您想下載該項目，可以在以下網址找到：[email protected]:fbgrecojr/Android-Application-Login-Activity-Template.git

如果您下載項目，用戶名：testuser和密碼：testpass將會起作用。

圖片：

初始登錄（工作）

按下返回按鈕，然後在登錄後

登錄嘗試再次（我重寫了重寫意圖）

LoginActivity.class

package com.projects.fbgrecojr.logintemplate.UI; 

import android.content.Context; 
import android.content.Intent; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.AsyncTask; 
import android.os.Handler; 
import android.support.design.widget.TextInputLayout; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.animation.AccelerateInterpolator; 
import android.view.animation.AlphaAnimation; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.view.animation.DecelerateInterpolator; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.LinearLayout; 
import android.widget.RelativeLayout; 
import android.widget.Toast; 

import com.facebook.shimmer.ShimmerFrameLayout; 
import com.projects.fbgrecojr.logintemplate.HTTPManager.HttpManager; 
import com.projects.fbgrecojr.logintemplate.HTTPManager.RequestPackage; 
import com.projects.fbgrecojr.logintemplate.Parser.JSONParser; 
import com.projects.fbgrecojr.logintemplate.R; 
import com.projects.fbgrecojr.logintemplate.Session.Session; 
import com.projects.fbgrecojr.logintemplate.Structures.User; 
import com.projects.fbgrecojr.logintemplate.Utility.UTILITY; 


/** 
* An example full-screen activity that shows and hides the system UI (i.e. 
* status bar and navigation/system bar) with user interaction. 
*/ 
public class LoginActivity extends AppCompatActivity implements View.OnClickListener{ 

    private EditText userName, password; 
    private Button login; 
    private RelativeLayout image; 
    private LinearLayout button, belowPic; 
    private Animation fadeInImage, fadeInButton, bottomUp, fadeOut; 
    private TextInputLayout inputLayoutName,inputLayoutPassword; 
    private ViewGroup hiddenPanel; 
    private ShimmerFrameLayout container, loggingIn; 
    private static final int SECOND = 1000; 
    private static final int HALF_SECOND = 500; 
    private static final int QUARTER_SECOND = 250; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 

     //INITIALIZE ANIMATION ITEMS 
     fadeInImage = new AlphaAnimation(0, 1); 
     fadeInButton = new AlphaAnimation(0, 1); 
     fadeOut = new AlphaAnimation(1.0f,0.0f); 
     bottomUp = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.bottom_up_animation); 
     fadeInImage.setInterpolator(new AccelerateInterpolator()); //and this 
     bottomUp.setInterpolator(new DecelerateInterpolator()); 

     //GET UI ELEMENTS 
     userName = (EditText) findViewById(R.id.userName); 
     password = (EditText) findViewById(R.id.password); 
     login = (Button) findViewById(R.id.login); 
     image = (RelativeLayout) findViewById(R.id.image); 
     button = (LinearLayout) findViewById(R.id.button); 
     container = (ShimmerFrameLayout) findViewById(R.id.shimmer); 
     belowPic = (LinearLayout) findViewById(R.id.below_picture); 
     loggingIn = (com.facebook.shimmer.ShimmerFrameLayout) findViewById(R.id.login_shimmer); 
     hiddenPanel = (ViewGroup)findViewById(R.id.input); 
     inputLayoutName = (TextInputLayout) findViewById(R.id.text_input_username); 
     inputLayoutPassword = (TextInputLayout) findViewById(R.id.text_input_password); 

     //SET UI PROPERTIES 
     loggingIn.setVisibility(View.INVISIBLE); 
     userName.setCursorVisible(false); 
     password.setCursorVisible(false); 
     password.setHint("Password"); 
     userName.setHint("Username"); 
     new Handler().postDelayed(new Runnable() { 
      @Override 
      public void run() { 
       userName.setCursorVisible(true); 
       password.setCursorVisible(true); 
       userName.requestFocus(); 
      } 
     }, LoginActivity.SECOND * 3); 

     //ANIMATIONS 
     fadeInImage.setDuration(SECOND * 3); 
     fadeOut.setStartOffset(SECOND); 
     fadeOut.setDuration(SECOND); 
     image.setAnimation(fadeInImage); 
     fadeInButton.setStartOffset(SECOND + HALF_SECOND + QUARTER_SECOND); 
     fadeInButton.setDuration(SECOND * 2); 
     button.setAnimation(fadeInButton); 
     hiddenPanel.startAnimation(bottomUp); 
     hiddenPanel.setVisibility(View.VISIBLE); 
     container.setDuration(SECOND * 2 + QUARTER_SECOND); 
     container.setRepeatDelay(QUARTER_SECOND); 
     container.setIntensity((float) 0.15); 
     container.setBaseAlpha((float) 0.75); 
     container.setFadingEdgeLength(3); 
     container.setDropoff((float) 0.40); 
     container.startShimmerAnimation(); 

     //ON CLICK LISTENERS 
     login.setOnClickListener(this); 
    } 

    public void onClick(View v) { 
     switch (v.getId()) { 
      case R.id.login: 

       if(getUserName().getText().toString().equals("") || getUserName().getText().toString().equals(" ")) { 
        inputLayoutName.setError("enter username"); 
       }else if(getPassword().getText().toString().equals("") || getPassword().getText().toString().equals(" ")){ 
        inputLayoutPassword.setError("enter password"); 
       }else{ 
        //webservice 
        if (UTILITY.isOnline(getApplicationContext())) { 
         RequestPackage p = new RequestPackage(); 
         p.setMethod("GET"); 
         p.setUri(UTILITY.UBUNTU_SERVER_URL); 
         p.setParam("query", "user"); 
         p.setParam("username", getUserName().getText().toString()); 
         new WebserviceCallOne().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, p); 
        } else { 
         Toast.makeText(getApplicationContext(), "you are not connected to the internet", Toast.LENGTH_LONG).show(); 
        } 
       } 
       break; 
     } 
    } 

    private void animateExit() { 
     //fade out annimation 
     belowPic.startAnimation(fadeOut); 
     belowPic.setVisibility(View.INVISIBLE); 
     fadeInImage.setStartOffset(SECOND * 2); 
     fadeInImage.setDuration(HALF_SECOND); 
     loggingIn.startAnimation(fadeInImage); 
     loggingIn.setVisibility(View.VISIBLE); 
     loggingIn.setDuration(SECOND); 
     loggingIn.startShimmerAnimation(); 
    } 

    public EditText getPassword() { 
     return password; 
    } 

    public EditText getUserName() { 
     return userName; 
    } 

    private class WebserviceCallOne extends AsyncTask<RequestPackage, String, User> { 
     @Override 
     protected User doInBackground(RequestPackage... params) { 
      String content = HttpManager.getData(params[0]); 
      return JSONParser.parseUserFeed(content); 
     } 

     @Override 
     protected void onPostExecute(User s) { 
      Session.setCurrentUser(s); 
      //if null, error stacktrace will print to the log. This is expected!! 
      if(Session.getCurrentUser() == null){ //username was incorrect 
       inputLayoutName.setError("username does not exist"); 
      }else{ //check password 
       if(getPassword().getText().toString().equals(s.getPassword())){ //passwords match 
        animateExit(); 
        new Handler().postDelayed(new Runnable() { 
         @Override 
         public void run() { 
          startActivity(new Intent(getApplicationContext(), MainActivity.class)); 
         } 
        },LoginActivity.SECOND * 4); 
       }else{ 
        inputLayoutPassword.setError("password incorrect"); 
       } 
      } 
     } 
    } 
}

MainActivity.class

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
    } 

    /** 
    * Take care of popping the fragment back stack or finishing the activity 
    * as appropriate. 
    */ 
    @Override 
    public void onBackPressed() { 
     startActivity(new Intent(this, LoginActivity.class)); 
    } 
}

來源

2015-12-12 frankgreco

你必須調用animateExit（）;在代碼的onResume methord

@Override 
    public void onResume() { 
     super.onResume(); 
     animateExit(); 
    }

來源

2015-12-12 06:05:13

我會嘗試這一點，但是當我調試，執行onCreate方法。 animateExit（）方法中的 – frankgreco

。它被稱爲成功登錄。引用私有類的onPostExecute（）方法WebServiceCallOne – frankgreco

此外，將代碼放入onResume並不能解決問題，因爲我在android生命週期方法中重寫並放置了toast調用，並且onCreate（）和onResume（）始終處於在初始實例和生成的實例中都被調用，點擊後退按鈕 – frankgreco

覆蓋的onResume（）在你的活動。

嘗試在onresume中開始您的動畫。
覆蓋的onPause（）在你的活動

嘗試停止你的動畫中的onPause。

希望這有助於:)

來源

2015-12-12 07:24:21 Jayanth

動畫重新啓動Android的活動

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