我编程一个测验应用程序，它以Activty（测验活动）开始。我已经设置了如果高分超过10，ImageView将永久显示在Menu2 Activity中。在重新启动应用程序时也能正常工作，唯一的问题是如果用户达到例如12的高分，则ImageView（trophy1）将不会立即显示。当用户在例如2的高分之后直接命中时，图片出现。然后图片永久地停留在那里。如何设置它在达到高分＆gt;时直接出现=
测验活动java：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz);
//Randomizes the row of the questions
QuestionLibrary q = new QuestionLibrary();
System.out.printf("Question:0 Choice:(%s, %s, %s) Answer:%s%n",
q.getChoice1(0), q.getChoice2(0), q.getChoice3(0), q.getCorrectAnswer(0));
q.shuffle();
System.out.printf("Question:0 Choice:(%s, %s, %s) Answer:%s%n",
q.getChoice1(0), q.getChoice2(0), q.getChoice3(0), q.getCorrectAnswer(0));
mQuestionLibrary.shuffle();
//End randomizer
//We need this for the NAVIGATION DRAWER
mToolbar = (Toolbar) findViewById(R.id.nav_action);
setSupportActionBar(mToolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true); //Able to see the Navigation Burger "Button"
NavigationView mNavigationView = (NavigationView) findViewById(R.id.nv1);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener(){
@Override
public boolean onNavigationItemSelected(MenuItem menuItem){
switch (menuItem.getItemId()){
case(R.id.nav_stats): //If nav stats selected Activity 2 will show up
Intent accountActivity = new Intent(getApplicationContext(),Menu2.class);
startActivity(accountActivity);
}
return true;
}
});
//Initialize
mScoreView = (TextView) findViewById(R.id.score_score);
mQuestionView = (TextView) findViewById(R.id.question);
mButtonChoice1 = (Button) findViewById(R.id.choice1);
mButtonChoice2 = (Button) findViewById(R.id.choice2);
mButtonChoice3 = (Button) findViewById(R.id.choice3);
updateQuestion(); //New question appears
//Start of Button Listener1 -> if true, next question appears +score +1[] Else menu 2 will show
mButtonChoice1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mButtonChoice1.getText() == mAnswer) {
mScore = mScore + 1;
updateScore(mScore);
updateQuestion();
Toast.makeText(QuizActivity.this, "Correct", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(QuizActivity.this, "Wrong... Try again!", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(QuizActivity.this, Menu2.class);
intent.putExtra("score",mScore); //pass score to Menu2
startActivity(intent);
}
}
});
//End of Button Listener1
//Start of Button Listener2
mButtonChoice2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mButtonChoice2.getText() == mAnswer) {
mScore = mScore + 1;
updateScore(mScore);
updateQuestion();
Toast.makeText(QuizActivity.this, "Correct", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(QuizActivity.this, "Oh... wrong your score is 0", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(QuizActivity.this, Menu2.class);
intent.putExtra("score",mScore); //pass score to Menu2
startActivity(intent);
}
}
});
//End of Button Listener2
//Start of Button Listener3
mButtonChoice3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//My logic for Button goes in here
if (mButtonChoice3.getText() == mAnswer) {
mScore = mScore + 1;
updateScore(mScore);
updateQuestion();
//This line of code is optional...
Toast.makeText(QuizActivity.this, "Correct", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(QuizActivity.this, "Come on, that was not so hard...", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(QuizActivity.this, Menu2.class);
intent.putExtra("score",mScore); //pass score to Menu2
startActivity(intent);
}
}
});
//End of Button Listener3
}
private void updateQuestion() {
//If the max. number of questions is reached, menu2 will be open if not a new quiz selection appears
if (mQuestionNumber < mQuestionLibrary.getLength()) {
mQuestionView.setText(mQuestionLibrary.getQuestion(mQuestionNumber));
mButtonChoice1.setText(mQuestionLibrary.getChoice1(mQuestionNumber));
mButtonChoice2.setText(mQuestionLibrary.getChoice2(mQuestionNumber));
mButtonChoice3.setText(mQuestionLibrary.getChoice3(mQuestionNumber));
mAnswer = mQuestionLibrary.getCorrectAnswer(mQuestionNumber);
mQuestionNumber++;
}
else {
Toast.makeText(QuizActivity.this, "Last Question! You are very intelligent!", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(QuizActivity.this, Menu2.class);
intent.putExtra("score",mScore); //pass score to Menu2
startActivity(intent);
}
}
private void updateScore ( int point){
mScoreView.setText("" + mScore);
//Shared preferences = a variabe (mScore) gets saved and call up in another activity
SharedPreferences mypref =getPreferences(MODE_PRIVATE);
int highScore = mypref.getInt("highScore", 0);
if(mScore> highScore){
SharedPreferences.Editor editor = mypref.edit();
editor.putInt("currentscore", mScore);
editor.apply();
}
}
@Override //Makes that the "Burger" Item, shows the Drawer if someone clicks on the simbol
public boolean onOptionsItemSelected (MenuItem item){
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
菜单2：
public class Menu2 extends AppCompatActivity {
private DrawerLayout mDrawerLayout2;
private ActionBarDrawerToggle mToggle;
private Toolbar mToolbar;
private Button popup;
private PopupWindow popupWindow;private LayoutInflater layoutInflater; //Alows to add a new layout in our window
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu2);
TextView txtScore = (TextView) findViewById(R.id.textScore2);
TextView txtHighScore = (TextView) findViewById(R.id.textHighScore);
ImageView imgTrophyView1 = (ImageView) findViewById(R.id.trophy1);
ImageView imgTrophyView2 = (ImageView) findViewById(R.id.trophy2);
Button bttPOPUP = (Button) findViewById(R.id.enablePOPUP);
Intent intent = getIntent();
int mScore = intent.getIntExtra("score", 0);
txtScore.setText("Your score is: " + mScore);
SharedPreferences mypref = getPreferences(MODE_PRIVATE);
int highScore = mypref.getInt("highScore", 0);
if (highScore >= mScore)
txtHighScore.setText("High score: " + highScore);
else {
txtHighScore.setText("New highscore: " + mScore);
SharedPreferences.Editor editor = mypref.edit();
editor.putInt("highScore", mScore);
editor.commit();
}
if (highScore >= 10) {
imgTrophyView1.setVisibility(View.VISIBLE);
bttPOPUP.setVisibility(View.VISIBLE);
}
if (highScore >= 20) {
imgTrophyView2.setVisibility(View.VISIBLE);
}
popup = (Button)findViewById(R.id.enablePOPUP);
popup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
layoutInflater =(LayoutInflater) getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup container = (ViewGroup)layoutInflater.inflate(R.layout.popup_menu2_1,null);
popupWindow = new PopupWindow(container,1000,980,true); //400,400=popUp size, true = makes that we can close the pop up by simply click out of the window
popupWindow.showAtLocation(mDrawerLayout2, Gravity.CENTER, 0, 0);
mDrawerLayout2.setAlpha((float) 0.1);
container.setOnTouchListener(new View.OnTouchListener(){
@Override
public boolean onTouch(View view, MotionEvent motionEvent ){
mDrawerLayout2.setAlpha((float) 1);
popupWindow.dismiss();
return true;
}
});
popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
@Override
public void onDismiss() {
mDrawerLayout2.setAlpha((float) 1);
popupWindow.dismiss();
}
});
}
});
mToolbar = (Toolbar)findViewById(R.id.nav_action);
setSupportActionBar(mToolbar);
mDrawerLayout2 = (DrawerLayout) findViewById(R.id.drawerLayout2);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout2, R.string.open, R.string.close);
mDrawerLayout2.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView mNavigationView = (NavigationView) findViewById(nv2);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem){
switch (menuItem.getItemId()){
case(R.id.nav_home2):
Intent accountActivity2 = new Intent(getApplicationContext(),QuizActivity.class);
startActivity(accountActivity2);
}
return true;
}
});
}
public void onClick(View view) {
Intent intent = new Intent(Menu2.this, QuizActivity.class);
startActivity(intent);
}
@Override //Makes that the "Burger" Item, shows the Drawer if someone clicks on the simbol
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
答案 0 :(得分：0)
这一行...
editor.putInt("currentscore", mScore);
那是做什么的？你永远不会在任何地方获得"currentscore"的价值......
这应该是"highScore"吗？
例如，使用String常量
进行诊断会更简单public class QuizActivity extends AppCompatActivity {
public static final String PREFS = "QuizPrefs";
public static final String KEY_HIGH_SCORE = "highScore";
public static final String KEY_CURRENT_SCORE = "score";
private SharedPreferences pref;
private int mScore;
@Override
protected void onCreate(Bundle b) {
...
this.prefs = getSharedPreferences(PREFS, MODE_PRIVATE);
}
...
private void updateScore(){
mScoreView.setText(String.valueOf(mScore));
int highScore = prefs.getInt(KEY_HIGH_SCORE, 0);
if(mScore > highScore){
prefs.edit().putInt(KEY_HIGH_SCORE, mScore).apply();
}
}
private void endQuiz() {
Intent intent = new Intent(QuizActivity.this, Menu2.class);
intent.putExtra(KEY_CURRENT_SCORE, mScore); //pass score to Menu2
startActivity(intent);
}
然后，在下一个Activity中，使用常量并检查正确的值
Intent intent = getIntent();
int score = intent.getIntExtra(QuizActivity.KEY_CURRENT_SCORE, 0);
txtScore.setText("Your score is: " + score);
SharedPreferences mypref = getSharedPreferences(QuizActivity.PREFS, MODE_PRIVATE);
int highScore = mypref.getInt(QuizActivity.KEY_HIGH_SCORE, 0);
if (highScore >= score)
txtHighScore.setText("High score: " + highScore);
else {
txtHighScore.setText("New highscore: " + score);
mypref.edit().putInt(QuizActivity.KEY_HIGH_SCORE, score).apply();
}
if (highScore >= 10) {
imgTrophyView1.setVisibility(View.VISIBLE);
bttPOPUP.setVisibility(View.VISIBLE);
}
if (highScore >= 20) {
imgTrophyView2.setVisibility(View.VISIBLE);
}
答案 1 :(得分：0)
如果您的图片尺寸较大，可能需要一段时间才能加载图片，这样会降低用户友好性。
调整以加快速度：
从＆＃39; drawable＆＃39;移动图像文件夹到＆＃39; drawable-nodpi＆＃39;资源目录中的文件夹。创建一个名为＆＃39; drawable-nodpi＆＃39;的文件夹。如果它现在还没有创建。
原因是因为它会根据设备自动更改图像的大小。