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嗨，所以即時嘗試做一個遊戲，我想要高分保存。從我最喜歡的閱讀到使用的共享偏好。這裏是我的代碼：保存一個int並使用sharedpreferences在alertdialouge中顯示它Android
我在這裏宣佈整數
public int score;
public int highScore;
SharedPreferences data;
public static String filename = "HighScore";
然後伊夫稱它在上創建。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data = getSharedPreferences(filename, 0);
SharedPreferences.Editor editor = data.edit();
editor.putInt("Hscore", highScore);
editor.commit();
}
，現在我想在alertdialouge
AlertDialog.Builder myAlert = new AlertDialog.Builder(this);
myAlert.setTitle("You have lost");
myAlert.setMessage("Your score was :" + score + "\n" + "Your Highscore is :" + \\read highscore and display here)
.setPositiveButton("OK", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which){
dialog.dismiss();
score=0;
TextView myScore = (TextView)findViewById(R.id.scoreTxt);
String points = String.valueOf(score);
myScore.setText(points);
}
})
.create();
謝謝您的幫助
public class MainActivity extends ActionBarActivity {
public int score;
public int highScore = 10;
SharedPreferences data;
public static String filename = "HighScore"; // This is shared preference name
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data = getSharedPreferences(filename, 0);
/*SharedPreferences.Editor editor = data.edit();
editor.putInt("HighScore", highScore);
editor.apply(); // Use editor.apply() for saving in background*/
SharedPreferences data = getSharedPreferences(filename, 0);
int currentscore;
currentscore = 10;
highScore = data.getInt("Hscore", 0); // lets say highscore = 100
if(highScore>currentscore)
{
// This will store the new high score in the sharedpreferences.
SharedPreferences.Editor editor = data.edit();
editor.putInt("Hscore", highScore);
editor.commit(); // Use editor.apply() for saving in background
// after this highscore will be 100
}
}
public void generateH(View v){
Random rand = new Random();
int number = rand.nextInt(2)+1;
TextView myText = (TextView)findViewById(R.id.coinResult);
if (number == 1){
myText.setText("HEADS");
TextView myScore = (TextView)findViewById(R.id.scoreTxt);
score = score+1;
String points = String.valueOf(score);
myScore.setText(points);
}
else{
myText.setText("TAILS");
AlertDialog.Builder myAlert = new AlertDialog.Builder(this);
myAlert.setTitle("You have lost");
myAlert.setMessage("Your score was :" + score + "\n" + "Your Highscore is: " + data.getInt("Hscore", 0))
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.create();
score = 0;
TextView myScore = (TextView) findViewById(R.id.scoreTxt);
String points = String.valueOf(score);
myScore.setText(points);
myAlert.show();
}
}
public void generateT(View v){
Random rand = new Random();
int number = rand.nextInt(2)+1;
TextView myText = (TextView)findViewById(R.id.coinResult);
if(score > highScore){
highScore = score;
}
if (number == 1){
myText.setText("HEADS");
AlertDialog.Builder myAlert = new AlertDialog.Builder(this);
myAlert.setTitle("You have lost");
myAlert.setMessage("Your score was :" + score + "\n" + "Your Highscore is :" + data.getInt("Hscore", 0))
.setPositiveButton("OK", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which){
dialog.dismiss();
}
})
.create();
score = 0;
TextView myScore = (TextView)findViewById(R.id.scoreTxt);
String points = String.valueOf(score);
myScore.setText(points);
myAlert.show();
}
else{
myText.setText("TAILS");
TextView myScore = (TextView)findViewById(R.id.scoreTxt);
score = score+1;
String points = String.valueOf(score);
myScore.setText(points);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
您可以使用相同的SharedPreferences對象來檢索特定的值。看看getInt（）方法。 – scana