我正在尝试制作一个Android应用程序，其中我有一个向服务器发送数据的按钮，我想在一次点击一段时间后（一天或几个小时）禁用按钮，我已经添加了代码这和那是正常的。 但是当我旋转屏幕时，按钮变为启用状态，当我将应用程序置于后台时，按钮再次启用。所以任何人都可以告诉我如何在任何条件下（屏幕旋转和放入背景）中的特定时间禁用该按钮。这是我的代码
SendLocation = (Button) findViewById(R.id.btnp_send_data_to_server);
if(user_name.equalsIgnoreCase(Hr)){
SendLocation.setVisibility(View.INVISIBLE);
}
else {
SendLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SendDataToServer(employeeId, lat, lon, username, timeStamp, mon,officeLocation, officeTimings);
SendLocation.setEnabled(false);
Timer buttonTimer = new Timer();
buttonTimer.schedule(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
SendLocation.setEnabled(true);
}
});
}
}, 1000 * 60 * 60);
} else {
locationTrack.showSettingsAlert();
}
}
});
}
<Button
android:id="@+id/btnp_send_data_to_server"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:background="@drawable/button_bg"
android:text="send location"
android:padding="10dp"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" />
<activity android:name=".ProfileActivity" />
<activity android:name=".SqliteActivity" />
<!-- <service android:name=".JobSchedulerService" -->
<!-- android:permission="android.permission.BIND_JOB_SERVICE" -->
<!-- android:exported="true"/> -->
<!-- <!– registering the receiver –> -->
<!-- <receiver -->
<!-- android:name=".MyAlarm" -->
<!-- android:enabled="true" -->
<!-- android:exported="true" /> -->
<activity android:name=".CheckAttendanceForEmployee" />
<activity android:name=".CheckAttendanceForHR" />
<activity android:name=".EmployeeAttendanceActivity" />
<activity android:name=".HrAttendanceActivity" />
<activity android:name=".TotalAttendanceActivity"></activity>
</application>
答案 0 :(得分：0)
在表现形式中，请添加 android：configChanges 属性，以避免在旋转屏幕时出现问题。
<activity
android:name=".login.LoginActivity"
android:configChanges="orientation|screenSize"
/>
如果您遇到任何问题，希望这对您有用，请告诉我。
答案 1 :(得分：0)
这是因为屏幕旋转再次调用活动（所有活动方法都会召回）。
public abstract class AbstractActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}}
答案 2 :(得分：0)
全局创建一个static变量，表示计时器仍在运行，并在onCreate中使用它来禁用它，如
private static boolean isRunning = false; //initially
<强>的onCreate
SendLocation = (Button) findViewById(R.id.btnp_send_data_to_server);
SendLocation.setEnabled(!isRunning);
<强> onClickListener
Timer buttonTimer = new Timer();
isRunning = true;
buttonTimer.schedule(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
isRunning = false;
SendLocation.setEnabled(true);
}
});
}
}, 1000 * 60 * 60);
答案 3 :(得分：0)
当屏幕方向改变时，Activity停止并重新创建（再次调用onCreate（）方法），它会将Button的属性重置为默认值，这会使Button再次点击。
现在要解决此问题，您必须覆盖到Activity方法1. onSaveInstanceState（）和2. onRestoreInstanceState（）。
当屏幕方向改变时，onSaveInstanceState（）方法调用第一个，在这里你必须保存你的Button状态，就像它可以点击一样。
在Activity重新创建调用的onRestoreInstanceState（）方法之后， 在这里你可以恢复按钮状态。
@Override
public void onSaveInstanceState(Bundle savedInstanceState){
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putBoolean(Btn_clickable, true);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
savedInstanceState.getBoolean("Btn_clickable");
}
答案 4 :(得分：0)
boolean click = false; //initial value of click state
button.setEnabled(click); // call this where you want to disable
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("click",click);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
click = savedInstanceState.getBoolean("click");
Log.d("click","clik "+click);
button.setEnabled(click);
}
活动在saveOnInstanceState中保存实例的状态，并通过调用RestoreInstancestate将其返回到重新加载视图
块引用
答案 5 :(得分：0)
尝试以下说明性示例：
Demo14.class：----------
public class Demo14 extends AppCompatActivity{
private Button b;
private CheckBox cb;
private CheckBox cb1;
private SharedPreferences preferences;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demo16);
preferences = getSharedPreferences("preferences",0);
cb = (CheckBox) findViewById(R.id.cb);
cb1 = (CheckBox) findViewById(R.id.cb1);
b = (Button) findViewById(R.id.b);
cb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
b.setEnabled(isChecked);
}
});
}
//called on device orientation changes
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if(outState != null) {
outState.putBoolean("cb", cb.isChecked());
if (cb.isChecked()) {
outState.putBoolean("cb1", cb1.isChecked());
outState.putBoolean("b", b.isEnabled());
} else {
outState.putBoolean("cb1", true);// default case is true
outState.putBoolean("b", true);// default case is true
}
}
}
//called after orientation is changed
@Override
protected void onRestoreInstanceState(Bundle savedState) {
super.onRestoreInstanceState(savedState);
if(savedState != null) {
cb.setChecked(savedState.getBoolean("cb", false));
cb1.setChecked(savedState.getBoolean("cb1", true));
b.setEnabled(savedState.getBoolean("b", true));
}
}
@Override
protected void onPause() {
super.onPause();
if(preferences != null){
setBoolean("cb",cb.isChecked());
if(cb.isChecked()){
setBoolean("cb1",cb1.isChecked());
setBoolean("b",b.isEnabled());
}else{
setBoolean("cb1",true);// default case is true
setBoolean("b",true);// default case is true
}
}
}
@Override
protected void onResume() {
super.onResume();
if(preferences != null){
cb.setChecked(preferences.getBoolean("cb",false));
cb1.setChecked(preferences.getBoolean("cb1", true));
b.setEnabled(preferences.getBoolean("b", true));
}
}
private void setBoolean(String preferenceName, boolean value)
{
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean(preferenceName, value);
editor.apply();
}
}
demo16：XML：----------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enable/Disable Button"
android:checked="true"
android:id="@+id/cb1"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button"
android:layout_marginStart="15dp"
android:id="@+id/b"/>
</LinearLayout>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save Button State"
android:checked="false"
android:id="@+id/cb"/>
</LinearLayout>