Java 如何使一个按钮按下一次并等待第二个按钮按下,反之亦然
你好,这是我在安卓工作室的代码Java 如何使一个按钮按下一次并等待第二个按钮按下,反之亦然,java,android,Java,Android,你好,这是我在安卓工作室的代码 public class GroupDesign extends AppCompatActivity { private static final String TAG = "Spectrum Inc"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); set
public class GroupDesign extends AppCompatActivity {
private static final String TAG = "Spectrum Inc";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_group_design);
//button do suf
Button lock = (Button) findViewById(R.id.lockit);
//set what happens when pressed
lock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "This is a secure message!");
Toast.makeText(getApplicationContext(), "Door Locked!", Toast.LENGTH_SHORT)
.show();
}
});
Button unlock = (Button) findViewById(R.id.unlockit);
//set what happens when pressed
unlock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "This is a secure message!");
Toast.makeText(getApplicationContext(), "Door Unlocked!", Toast.LENGTH_SHORT)
.show();
}
});
}
}
您可以有一个布尔标志。如果要隐藏按钮,请更新按钮的启用状态甚至可见性
boolean locked = false;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_group_design);
Button lock, unlock;
lock = (Button) findViewById(R.id.lockit); //set what happens when pressed
lock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "This is a secure message!");
Toast.makeText(getApplicationContext(), "Door Locked!", Toast.LENGTH_SHORT) .show();
locked = true;
unlock.setEnabled(true);
lock.setEnabled(false);
}
});
unlock = (Button) findViewById(R.id.unlockit); //set what happens when pressed
unlock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "This is a secure message!");
Toast.makeText(getApplicationContext(), "Door Unlocked!", Toast.LENGTH_SHORT) .show();
locked = false;
lock.setEnabled(true);
unlock.setEnabled(false);
}
});
}
}
如果要隐藏按钮而不是禁用按钮,可以将setEnabled(false)
替换为setVisibility(View.GONE)
或者,如果您做的不多,您可以只使用一个按钮,然后更改标签文本。使用布尔标志,并在单击按钮时更新这些标志。您基本上希望在任何时刻只有一个按钮可用。锁定或解锁,而不是同时锁定或解锁。是吗?你好,谢谢你的回复,结果我把按钮藏起来了。谢谢