所以现在我正在尝试为我的小孩开发一个 Android 应用程序。我想在选定的应用程序上设置特定时间的 pin 或密码，以防止它们打开应用程序。例如，假设我的女儿想在我工作的时候在我的手机上玩愤怒的小鸟一段时间。我将选择我的重要应用程序，如消息、gmail 等，并在她玩愤怒的小鸟时在其上放置 30 分钟的 pin 或密码。30 分钟后，我从女儿那里拿到手机，因为时间限制已过，我无需密码即可打开应用程序。
我对此进行了大量研究，但我无法为我的特定案例找到实现。
我知道应用锁具有与我想要做的类似的结构。我只是为锁定设置一个时间限制。
https://play.google.com/store/apps/details?id=com.domobile.applock&hl=en
我远离使用 ActivityManager 等杀死活动/应用程序。我真的只想在特定时间内在选定的应用程序上保持干净的锁定屏幕。
我有一个 CountdownTimer 来倒计时我设置的时间。如果我拥有所有包名，我将如何修改此代码以在选定的时间内阻止某些应用程序？
start_timer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new AlertDialog.Builder( MainActivity.this )
.setMessage( "Are you sure you want to block the selected apps for the set amount of time?" )
.setPositiveButton( "Yeah man!", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.d( "AlertDialog", "Positive" );
hourint = Integer.valueOf(number_text.getText().toString());
minuteint = Integer.valueOf(minute_text.getText().toString());
secondint = Integer.valueOf(second_text.getText().toString());
Log.i("YourActivity", "Hours: " + hourint);
Log.i("YourActivity", "Minutes: " + minuteint);
Log.i("YourActivity", "Seconds: " + secondint);
totalTimeCountInMilliseconds = ((hourint*60*60) +(minuteint*60) + (secondint)) * 1000; // time count
timeBlinkInMilliseconds = 30*1000;
countDownTimer = new CountDownTimer(totalTimeCountInMilliseconds, 500) {
// 500 means, onTick function will be called at every 500 milliseconds
@Override
public void onTick(long leftTimeInMilliseconds) {
Context context = MainActivity.this;
long seconds = leftTimeInMilliseconds / 1000;
mSeekArc.setVisibility(View.INVISIBLE);
start_timer.setVisibility(View.INVISIBLE);
block_button1.setVisibility(View.INVISIBLE);
if ( leftTimeInMilliseconds < timeBlinkInMilliseconds ) {
// textViewShowTime.setTextAppearance(getApplicationContext(), R.style.blinkText);
// change the style of the textview .. giving a red alert style
if ( blink ) {
number_text.setVisibility(View.VISIBLE);
minute_text.setVisibility(View.VISIBLE);
second_text.setVisibility(View.VISIBLE);
// if blink is true, textview will be visible
} else {
number_text.setVisibility(View.INVISIBLE);
minute_text.setVisibility(View.INVISIBLE);
second_text.setVisibility(View.INVISIBLE);
}
blink = !blink; // toggle the value of blink
}
second_text.setText(String.format("%02d", seconds % 60));
minute_text.setText(String.format("%02d", (seconds / 60) % 60));
number_text.setText(String.format("%02d", seconds / 3600)); // format the textview to show the easily readable format
}
@Override
public void onFinish() {
// this function will be called when the timecount is finished
//textViewShowTime.setText("Time up!");
number_text.setVisibility(View.VISIBLE);
minute_text.setVisibility(View.VISIBLE);
second_text.setVisibility(View.VISIBLE);
mSeekArc.setVisibility(View.VISIBLE);
start_timer.setVisibility(View.VISIBLE);
block_button1.setVisibility(View.VISIBLE);
}
}.start();
}
})
.setNegativeButton("Nope!", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.d("AlertDialog", "Negative");
dialog.cancel();
}
})
.show();
编辑：http : //pastebin.com/MHGFw7PK