【发布时间】：2014-02-06 05:23:13
【问题描述】：
由于我是 android 新手，我的问题是我正在开发一个应用程序，我想通过单击主页中的按钮来增加/减少数字，但首先应该在设置菜单中检查复选框被选中，如果选中则仅执行操作...
MainActivity.java
package com.example.sanple;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
public Button incre;
public Button dec;
public TextView nub;
public static int count = 0;
public String string;
/*
* @Override protected void onStart() { super.onStart();
*
* Bundle bundle = getIntent().getExtras(); if (bundle != null) { if
* (bundle.getBoolean("checked")) { MainActivity activity = new
* MainActivity(); activity.addListenerOnCheckbox(); } else {
* Toast.makeText(getApplicationContext(), "try to check the checkbox",
* Toast.LENGTH_SHORT).show(); }
*
* } }
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
addListenerOnCheckbox();
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
void addListenerOnCheckbox() {
incre = (Button) findViewById(R.id.increment);
dec = (Button) findViewById(R.id.decrement);
nub = (TextView) findViewById(R.id.brakecounter);
incre.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Log.d("src", "button clciked");
count++;
string = Integer.toString(count);
nub.setText(string);
}
});
dec.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Log.d("src", "button clciked");
count--;
string = Integer.toString(count);
nub.setText(string);
}
});
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int action = event.getAction();
int keycode = event.getKeyCode();
switch (keycode) {
case KeyEvent.KEYCODE_VOLUME_UP:
if (action == KeyEvent.ACTION_UP) {
int i = count++;
if (i > 10) {
Toast.makeText(getApplicationContext(),
"applying too many times brake", Toast.LENGTH_SHORT)
.show();
}
string = Integer.toString(count);
nub.setText(string);
}
return true;
case KeyEvent.KEYCODE_VOLUME_DOWN:
if (action == KeyEvent.ACTION_DOWN) {
count--;
string = Integer.toString(count);
nub.setText(string);
}
default:
break;
}
return super.dispatchKeyEvent(event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// MenuInflater inflater = new MenuInflater(getApplicationContext());
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
Intent startActivity = new Intent(this, Settings.class);
startActivity(startActivity);
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
}
Settings.java
package com.example.sanple;
import android.R.color;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.TextView;
public class Settings extends Activity {
public TextView view;
public CheckBox box;
public Button button;
// KeyEvent KeyEvent = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
view = (TextView) findViewById(R.id.enable_counter);
box = (CheckBox) findViewById(R.id.checkBox1);
box.setBackgroundColor(color.black);
button = (Button) findViewById(R.id.save);
box.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
/*//here we r setting checked true
box.setChecked(true);
Intent intent = new Intent();
intent.putExtra("Checked", true);*/
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.settings, menu);
return true;
}
}
复选框 xml..
activity_settings.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Settings" >
<TextView
android:id="@+id/enable_counter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="51dp"
android:layout_marginTop="34dp"
android:text="enable_counter"
android:textColor="#f00" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/enable_counter"
android:layout_alignBottom="@+id/enable_counter"
android:layout_alignParentRight="true"
android:layout_marginRight="39dp" />
<Button
android:id="@+id/save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/checkBox1"
android:layout_marginBottom="64dp"
android:text="save" />
</RelativeLayout>
【问题讨论】：
标签： android checkbox sharedpreferences