Activity有谁知道去另一个地方时如何完全结束Activity？我finish()在活动上放了一个来终止它。但是当我按下手机的后退键或在模拟器中时，它会回到Activity我打开的最后一个。例如：
Activity A 是菜单，B 是订单，C 也是订单，D 是付款。
Activity A去Activity B，Activity B去Activity C，Activity C去Activity D。如果我按下手机或模拟器的返回键，当我在其中时，Activity D它会返回到 C、B 和 A。但正确的应该是从Activity D返回到Activity A。如果我再次按返回键，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。
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();
}
}
这是我的说明页面：
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();
}
}
回到菜单然后我的游戏关卡：
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();
}
}
这是我的简单游戏：
public class Maingame extends Activity {
int v,x,y,z;
public void onAttachedToWindow() {
super.onAttachedToWindow();
Window window = getWindow();
window.setFormat(PixelFormat.RGBA_8888);
displayIntentData();
////////////////////////////////score calculation/////////////////////
initControls();
}
private void initControls()
{
amount1=(EditText)findViewById(R.id.amount1);
amount2=(EditText)findViewById(R.id.amount2);
amount3=(EditText)findViewById(R.id.amount3);
result=(TextView)findViewById(R.id.result);
calculate=(Button)findViewById(R.id.finish);
calculate.setOnClickListener(new Button.OnClickListener()
{public void onClick
(View v) { calculate();}});
}
private void calculate()
{
if(amount1.getText().toString().equals(""))
{
x=0;
}
else
{
x=Integer.parseInt(amount1.getText().toString());
}
if(amount2.getText().toString().equals(""))
{
y=0;
}
else
{
y=Integer.parseInt(amount2.getText().toString());
}
if(amount3.getText().toString().equals(""))
{
v=0;
}
else
{
v=Integer.parseInt(amount3.getText().toString());
}
z=x+y+v;
result.setText(Integer.toString(z));
////////////////////////////////score calculation/////////////////////
findViewById(R.id.finish).setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(Maingame.this,score.class);
intent.putExtra("key",((TextView)findViewById(R.id.result)).getText().toString());
startActivity(intent);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
displayIntentData();
}
private void displayIntentData(){
Intent intent = getIntent();
TextView tv = (TextView)findViewById(R.id.intentData);
Bundle extras=intent.getExtras();
if(extras!=null){
tv.setText(" "+extras.getString("key"));
}else{
tv.setText("");
}
}
private Gallery gallery;
TextView select1;
TextView select2;
TextView select3;
TextView result;
EditText amount1;
EditText amount3;
EditText amount2;
EditText pauseb;
Button calculate;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maingame);
Button pauseButton = (Button)findViewById(R.id.pause);
pauseButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent backcreIntent = new Intent(Maingame.this,pauseg.class);
startActivity(backcreIntent);
}
});
gallery = (Gallery) findViewById(R.id.examplegallery);
gallery.setAdapter(new AddImgAdp(this));
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
if (position == 0 ) {
//Toast.makeText(Maingame.this, "heart", Toast.LENGTH_SHORT).show();
select1 = (TextView) findViewById(R.id.txt1);
select1.setText("Head");
amount1.setText("1000");
} else if (position == 1) {
select1 = (TextView) findViewById(R.id.txt1);
select1.setText("Eye");
amount1.setText("0");
} else if (position == 2) {
select1 = (TextView) findViewById(R.id.txt1);
select1.setText("Intestine");
amount1.setText("0");
} else if (position == 3) {
select2 = (TextView) findViewById(R.id.txt2);
select2.setText("Ear");
amount2.setText("0");
} else if (position == 4) {
select2 = (TextView) findViewById(R.id.txt2);
select2.setText("liver");
amount2.setText("0");
} else if (position == 5) {
select2 = (TextView) findViewById(R.id.txt2);
select2.setText("Arm");
amount2.setText("1000");
} else if (position == 6) {
select3 = (TextView) findViewById(R.id.txt3);
select3.setText("Hand");
amount3.setText("0");
Toast.makeText(Maingame.this, "Click Finish To Submit Your Answer", Toast.LENGTH_LONG).show();
} else if (position == 7) {
select3 = (TextView) findViewById(R.id.txt3);
select3.setText("Foot");
amount3.setText("0");
Toast.makeText(Maingame.this, "Click Finish To Submit Your Answer", Toast.LENGTH_LONG).show();
} else if (position == 8) {
select3 = (TextView) findViewById(R.id.txt3);
select3.setText("Legs");
amount3.setText("1000");
Toast.makeText(Maingame.this, "Click Finish To Submit Your Answer", Toast.LENGTH_LONG).show();
}
}
});
Button clear = (Button)findViewById(R.id.clear);
clear.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
((TextView) findViewById(R.id.txt1)).setText("");
((TextView) findViewById(R.id.txt2)).setText("");
((TextView) findViewById(R.id.txt3)).setText("");
}
});
}
public class AddImgAdp extends BaseAdapter {
int GalItemBg;
private Context cont;
// Adding images.
private Integer[] Imgid = {
R.drawable.head,R.drawable.eye, R.drawable.largeintestine,R.drawable.ear, R.drawable.liver, R.drawable.arm
,R.drawable.hand,R.drawable.foot,R.drawable.legs};
public AddImgAdp(Context c) {
cont = c;
TypedArray typArray = obtainStyledAttributes(R.styleable.BodyPartsGame);
GalItemBg = typArray.getResourceId(R.styleable.BodyPartsGame_android_galleryItemBackground, 0);
typArray.recycle();
}
public int getCount() {
return Imgid.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imgView = new ImageView(cont);
imgView.setImageResource(Imgid[position]);
// Fixing width & height for image to display
imgView.setLayoutParams(new Gallery.LayoutParams(80, 70));
imgView.setScaleType(ImageView.ScaleType.FIT_XY);
imgView.setBackgroundResource(GalItemBg);
return imgView;
}
}
}
当我按下手机或模拟器的后退按钮时，它会回到我打开的最后一个活动。如果我打开游戏菜单 -----> 说明 -----> 返回菜单 -----> 新游戏 ----> 游戏关卡 -----> 简单游戏，然后按返回按钮回到我最近的开放活动。
如何解决？