任何人都知道如何在转到另一个Activity时完全结束Activity？我在活动上放了一个finish()来终止它。但是当我按下电话的后退键或模拟器时，它会回到最后Activity我打开。例如：
活动A是菜单，B是订单，C也是订单，D是付款。
Activity A转到Activity B，Activity B转到Activity C，Activity C转到Activity D。
如果我按下电话的后退键或模拟器当我在Activity D时，它会返回到C，B和A.但是正确的应该从Activity D返回到{{ 1}}。如果我再次按后退键，它将关闭应用程序。
任何人都知道如何清楚地结束活动？
谢谢！
我有一个不同的程序，这是我的游戏菜单。
Activity A这是我的说明页面：
public class BodyPartsGameActivity extends Activity {
protected boolean _active = true;
protected int _splashTime = 1000;
public void onAttachedToWindow() {
super.onAttachedToWindow();
Window window = getWindow();
window.setFormat(PixelFormat.RGBA_8888);
}
MediaPlayer mp1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
StartAnimations();
}
private void StartAnimations() {
Animation anim = AnimationUtils.loadAnimation(this, R.anim.alpha);
anim.reset();
LinearLayout l=(LinearLayout) findViewById(R.id.mainlay);
l.clearAnimation();
l.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.clouds);
anim.reset();
Button iv = (Button) findViewById(R.id.cloud);
iv.clearAnimation();
iv.startAnimation(anim);
mp1 = MediaPlayer.create(this,R.raw.officialbackgroundmusic);
mp1.start();
final MediaPlayer mp = MediaPlayer.create(this, R.raw.button);
final Vibrator mVibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
Button newgameButton = (Button)findViewById(R.id.newgame);
newgameButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent newgameIntent = new Intent(BodyPartsGameActivity.this,pgone.class);
startActivity(newgameIntent);
mp.start();
mVibrator.vibrate(500);
}
});
final MediaPlayer ms = MediaPlayer.create(this, R.raw.button);
Button highscoresButton = (Button)findViewById(R.id.highscores);
highscoresButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent highscoresIntent = new Intent(BodyPartsGameActivity.this,highscores.class);
startActivity(highscoresIntent);
ms.start();
mVibrator.vibrate(500);
}
});
Button instructionButton = (Button)findViewById(R.id.settings);
instructionButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent instructionsIntent = new Intent(BodyPartsGameActivity.this,settingstwo.class);
startActivity(instructionsIntent);
mp.start();
mVibrator.vibrate(500);
}
});
Button instructionsButton = (Button)findViewById(R.id.instructions);
instructionsButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent instructionsIntent = new Intent(BodyPartsGameActivity.this,instructions.class);
startActivity(instructionsIntent);
ms.start();
mVibrator.vibrate(500);
}
});
final ImageView mNotification_on_btn=(ImageView)findViewById(R.id.on_btn);
final ImageView mNotification_off_btn=(ImageView)findViewById(R.id.off_btn);
mNotification_on_btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mNotification_on_btn.setVisibility(View.GONE);
mNotification_off_btn.setVisibility(View.VISIBLE);
}
});
ImageView pausresumeButton = (ImageView)findViewById(R.id.on_btn);
pausresumeButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if(mp1.isPlaying())
{
mp1.pause();
}
else
{
mp1.start();
}
}});
mNotification_off_btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mNotification_off_btn.setVisibility(View.GONE);
mNotification_on_btn.setVisibility(View.VISIBLE);
}
});
}
@Override
protected void onPause() {
if (this.isFinishing()){ //basically BACK was pressed from this activity
mp1.stop();
Toast.makeText(BodyPartsGameActivity.this, "You Pressed Back Button on Your 'HOME' The Game was ended. ", Toast.LENGTH_SHORT).show();
}
Context context = getApplicationContext();
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> taskInfo = am.getRunningTasks(1);
if (!taskInfo.isEmpty()) {
ComponentName topActivity = taskInfo.get(0).topActivity;
if (!topActivity.getPackageName().equals(context.getPackageName())) {
mp1.stop();
Toast.makeText(BodyPartsGameActivity.this, "YOU LEFT YOUR APP", Toast.LENGTH_SHORT).show();
}
}
super.onPause();
mp1.reset();
}
}
返回菜单，然后返回我的游戏关卡：
public class instructions extends Activity{
MediaPlayer mPlayer;
protected boolean _active = true;
protected int _splashTime = 1000;
public void onAttachedToWindow() {
super.onAttachedToWindow();
Window window = getWindow();
window.setFormat(PixelFormat.RGBA_8888);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.instructions);
StartAnimations();
}
private void StartAnimations() {
Animation anim = AnimationUtils.loadAnimation(this, R.anim.alpha);
anim.reset();
LinearLayout l=(LinearLayout) findViewById(R.id.instbg);
l.clearAnimation();
l.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controll);
anim.reset();
Button iv = (Button) findViewById(R.id.hwtoply);
iv.clearAnimation();
iv.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controlll);
anim.reset();
Button ib = (Button) findViewById(R.id.cntrls);
ib.clearAnimation();
ib.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controllll);
anim.reset();
Button ic = (Button) findViewById(R.id.trivia);
ic.clearAnimation();
ic.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controlllll);
anim.reset();
Button iz = (Button) findViewById(R.id.about);
iz.clearAnimation();
iz.startAnimation(anim);
Button back4Button = (Button)findViewById(R.id.back4);
back4Button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent back4Intent = new Intent(instructions.this,BodyPartsGameActivity.class);
startActivity(back4Intent);
finish();
}
});
Button howtoButton = (Button)findViewById(R.id.hwtoply);
howtoButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent howtoIntent = new Intent(instructions.this,howto.class);
startActivity(howtoIntent);
}
});
Button ctrlsButton = (Button)findViewById(R.id.cntrls);
ctrlsButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent ctrlsIntent = new Intent(instructions.this,controls.class);
startActivity(ctrlsIntent);
}
});
Button triviaButton = (Button)findViewById(R.id.trivia);
triviaButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent triviaIntent = new Intent(instructions.this,trivia.class);
startActivity(triviaIntent);
}
});
Button abwtButton = (Button)findViewById(R.id.about);
abwtButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent abwtIntent = new Intent(instructions.this,about.class);
startActivity(abwtIntent);
}
});
}
@Override
protected void onDestroy() {
setResult(2);
super.onDestroy();
}
}
这是我的简单游戏：
public class gamelevel extends Activity {
protected boolean _active = true;
protected int _splashTime = 1000;
public void onAttachedToWindow() {
super.onAttachedToWindow();
Window window = getWindow();
window.setFormat(PixelFormat.RGBA_8888);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gamelevel);
StartAnimations();
}
private void StartAnimations() {
Animation anim = AnimationUtils.loadAnimation(this, R.anim.alpha);
anim.reset();
LinearLayout l=(LinearLayout) findViewById(R.id.gmlvl);
l.clearAnimation();
l.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controll);
anim.reset();
Button iv = (Button) findViewById(R.id.easypg);
iv.clearAnimation();
iv.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controlll);
anim.reset();
Button ib = (Button) findViewById(R.id.mediumpg);
ib.clearAnimation();
ib.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.controllll);
anim.reset();
Button ic = (Button) findViewById(R.id.hard);
ic.clearAnimation();
ic.startAnimation(anim);
Button easypButton = (Button)findViewById(R.id.easypg);
easypButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent easypIntent = new Intent(gamelevel.this,Maingame.class);
startActivity(easypIntent);
finish();
}
});
Button mediumButton = (Button)findViewById(R.id.mediumpg);
mediumButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent mediumIntent = new Intent(gamelevel.this,Mediumgame.class);
startActivity(mediumIntent);
finish();
}
});
Button hardButton = (Button)findViewById(R.id.hard);
hardButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent hardIntent = new Intent(gamelevel.this,Hardgame.class);
startActivity(hardIntent);
finish();
}
});
Button back1Button = (Button)findViewById(R.id.back1);
back1Button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent back1Intent = new Intent(gamelevel.this,BodyPartsGameActivity.class);
startActivity(back1Intent);
finish();
}
});
}
@override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK)
{
moveTaskToBack(true);
return true; // return
}
return false;
}
@Override
protected void onDestroy() {
super.onDestroy();
}
}
当我按下电话或模拟器的后退按钮时，它会返回到我打开的最后一个活动。如果我打开游戏菜单-----＆gt;指令-----＆gt;回到菜单-----＆gt;新游戏----＆gt;游戏关卡-----＆gt;简单的游戏，我按回按钮，它回到我最近开放的活动。
如何解决这个问题？
答案 0 :(得分：0)
在Activity A，您应致电startActivity以启动Activity B，但不应致电finish()。在Activity B中，当需要转到Activity C时，您应该以适当的意图致电startActivity并立即致电finish()。例如：
private void timeForActivityC() {
Intent intent = new Intent(this, ActivityC.class);
startActivity(intent);
finish();
}
同样适用Activity C时需要启动Activity D。然后，当您从Activity D返回时，您应该再次看到Activity A。
如果您认为自己已经这样做了，那么请发布您的代码，因为您不是。
答案 1 :(得分：0)
每次启动下一个活动时都不需要显式调用结束，只需将android：noHistory =“true”设置为要从活动堆栈中删除的活动。