在更改模拟器的方向时，我有一些非常奇怪的问题。在我的应用程序中，当我点击一个图像按钮时，我会从我的主要活动中调用名为“设置”的活动。这是代码：
final ImageButton stbtn = (ImageButton) findViewById(R.id.stbtn);
stbtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent stopn = new Intent(MyApp.this, Settings.class);
startActivity(stopn);
}
});
以下是关闭设置活动的方法：
@Override
public void onBackPressed() {
// do something on back.
finish();
return;
}
@Override
protected void onPause(){
super.onPause();
saveSettings();
}
在我的主要活动中，我有表面视图，每秒更新一次屏幕。我转到设置屏幕更改设置，然后按后退按钮关闭它，然后它进入主活动屏幕，这工作正常。现在的问题是当我在应用程序在主屏幕上更改方向时，它会打开设置活动。是因为我没有关闭活动，还是其他什么？有人可以帮我这个吗？感谢
编辑：
以下是mainfest和活动的代码
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp"
android:versionCode="1"
android:versionName="1.0">
<application android:name=".myappApp" android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MyAlarm"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
android:configChanges="orientation"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Settings" android:label="@string/app_name">
</activity>
</application>
</manifest>
主要活动代码：
public class MyAlarm extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getClockSettings();
HandView hndView = (HandView) findViewById(R.id.hndView);
clkapp = ((myappApp)getApplicationContext());
hndView.setStyle(clkapp.getClkStyle(), clkapp.isAnalog());
final ImageButton alrbtn = (ImageButton) findViewById(R.id.alrbtn);
alrbtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
}
});
final ImageButton stbtn = (ImageButton) findViewById(R.id.stbtn);
stbtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent stopn = new Intent(MyAlarm.this, Settings.class);
//stopn.setClassName("com.example.myapp", "com.example.myapp.Settings");
startActivity(stopn);
}
});
stbtn.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
v.requestFocusFromTouch();
Intent stopn = new Intent(MyAlarm.this, Settings.class);
//stopn.setClassName("com.example.myapp", "com.example.myapp.Settings");
startActivity(stopn);
return true;
}
});
}
protected void getClockSettings() {
//getting setting from preferences
clkSettings = getSharedPreferences(PREFS_NAME, 0);
if (clkapp == null) clkapp = ((myappApp)getApplicationContext());
clkapp.clkSettings = clkSettings;
if (clkSettings == null) {
/*clk24 = false;
clkAnalogue = true;
dSec = true;
_clockStyle = "Black";*/
clkapp.set24Hr(false);
clkapp.setAnalog(true);
clkapp.setDisplaySec(true);
clkapp.setClkStyle("Black");
}
else {
/*clk24 = clkSettings.getBoolean("24Hr", false);
dSec = clkSettings.getBoolean("dSecond", true);
clkAnalogue = clkSettings.getBoolean("ClkAnalogue", true);
if (clkAnalogue) _clockStyle = clkSettings.getString("ClkAnalogStyle", "Black");
else _clockStyle = clkSettings.getString("ClkAnalogStyle", "DigitalBlack");*/
clkapp.set24Hr(clkSettings.getBoolean("24Hr", false));
clkapp.setAnalog(clkSettings.getBoolean("ClkAnalogue", true));
clkapp.setDisplaySec(clkSettings.getBoolean("dSecond", true));
if (clkapp.isAnalog()) clkapp.setClkStyle(clkSettings.getString("ClkAnalogStyle", "Black"));
else clkapp.setClkStyle(clkSettings.getString("ClkAnalogStyle", "DigitalBlack"));
}
}
public void onConfigurationChanged(Configuration newConfig) {
//ignore orientation change
super.onConfigurationChanged(newConfig);
}
}
设置活动：
public class Settings extends Activity {
//Your member variable declaration here
private RadioButton crbon;
private RadioButton blue;
private RadioButton bbl;
private RadioButton crbdig;
private RadioButton grndig;
private ToggleButton tb24;
private ToggleButton tbsec;
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
//Your code here
super.onCreate(savedInstanceState);
setContentView(R.layout.settings);
myappApp clkapp = ((myappApp)getApplicationContext());
//RadioGroup rbgrp = (RadioGroup)findViewById(R.id.rbfacegrp);
crbon=(RadioButton)findViewById(R.id.radio_carbon);
blue=(RadioButton)findViewById(R.id.radio_blue);
bbl=(RadioButton)findViewById(R.id.radio_bbl);
crbdig=(RadioButton)findViewById(R.id.radio_crbdig);
grndig=(RadioButton)findViewById(R.id.radio_grndig);
tb24=(ToggleButton)findViewById(R.id.tbhr);
tbsec=(ToggleButton)findViewById(R.id.tbsec);
if(clkapp.getClkStyle().toLowerCase().equals("black")) {
crbon.setChecked(true);
}
else if(clkapp.getClkStyle().toLowerCase().equals("blue")) {
blue.setChecked(true);
}
else if(clkapp.getClkStyle().toLowerCase().equals("bubble")) {
bbl.setChecked(true);
}
else if(clkapp.getClkStyle().toLowerCase().equals("digitalblack")) {
crbdig.setChecked(true);
}
else if(clkapp.getClkStyle().toLowerCase().equals("digitalgreen")) {
grndig.setChecked(true);
}
tb24.setChecked(clkapp.is24Hr());
tbsec.setChecked(clkapp.isDisplaySec());
}
@Override
protected void onPause(){
super.onPause();
saveSettings();
//this.finish();
}
protected void saveSettings() {
boolean clkAna = true;
myappApp clkapp = ((myappApp)getApplicationContext());
SharedPreferences.Editor edt = clkapp.clkSettings.edit();
edt.putBoolean("24Hr", tb24.isChecked());
edt.putBoolean("dSecond", tbsec.isChecked());
clkapp.set24Hr(tb24.isChecked());
clkapp.setDisplaySec(tbsec.isChecked());
if (crbon.isChecked()) {
edt.putString("ClkAnalogStyle", "Black");
clkapp.setClkStyle("Black");
clkAna = true;
}
else if (blue.isChecked()) {
edt.putString("ClkAnalogStyle", "Blue");
clkapp.setClkStyle("Blue");
clkAna = true;
}
else if (bbl.isChecked()) {
edt.putString("ClkAnalogStyle", "Bubble");
clkapp.setClkStyle("Bubble");
clkAna = true;
}
else if (crbdig.isChecked()) {
edt.putString("ClkAnalogStyle", "DigitalBlack");
clkapp.setClkStyle("DigitalBlack");
clkAna = false;
}
else if (grndig.isChecked()) {
edt.putString("ClkAnalogStyle", "DigitalGreen");
clkapp.setClkStyle("DigitalGreen");
clkAna = false;
}
clkapp.setAnalog(clkAna);
edt.putBoolean("ClkAnalogue", clkAna);
edt.commit();
}
@Override
public void onBackPressed() {
// do something on back.
finish();
return;
}
}
答案 0 :(得分：0)
当设备旋转时，它会杀死并重新创建活动，这是一个真正的痛苦。除非你真的需要这种行为，否则最简单的方法就是禁用它。要做到这一点，请在AndroidManifest中使用以下内容，告诉系统您将自己处理旋转。通常，这实际上不需要特殊的代码，它只是起作用。
<activity android:label="@string/my_activity_name" android:name="MyActivity" android:configChanges="keyboard|keyboardHidden|orientation" />