运行应用程序后，主页中的一个按钮无法正常工作。当我点击在医院附近＆＃39; （附近医院1）没有任何反应。这个按钮被链接到另一个页面，该页面显示使用位置服务的附近医院。程序中没有错误。有没有人看到我放错位置或犯了错误的东西？
Home.java
public class home extends AppCompatActivity implements LocationListener{
Button alert;
RelativeLayout rl1;
Button nearhospitals1;
TextView nearpolice;
TextView allhspt;
TextView allpoli;
TextView Bld;
LocationManager locationManager;
String mprovider;
// Button service;
String longitude, latitude;
// SharedPreferences shared;
// SharedPreferences.Editor editor;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
alert=(Button)findViewById(R.id.button_alert);
// shared = getSharedPreferences("get", Context.MODE_PRIVATE);
// editor = shared.edit();
nearhospitals1= (Button) findViewById(R.id.nearhospitals1);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
mprovider = locationManager.getBestProvider(criteria, false);
if (mprovider != null && !mprovider.equals("")) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Location location = locationManager.getLastKnownLocation(mprovider);
locationManager.requestLocationUpdates(mprovider, 15000, 1, this);
if (location != null)
onLocationChanged(location);
else
Toast.makeText(getBaseContext(), "TURN ON GPS", Toast.LENGTH_SHORT).show();
}
alert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SharedPreferences pref = getApplicationContext().getSharedPreferences("pref", MODE_PRIVATE);
String cal = pref.getString("call", "");
String sms=pref.getString("msg","");
Log.e(cal, "gbggfgffg");
Intent inte = new Intent(Intent.ACTION_CALL);
inte.setData(Uri.parse("tel:" + cal));
if (ActivityCompat.checkSelfPermission(home.this,
Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
return;
}
// Uri smsToUri = Uri.parse("smsto:" + sms);
// message = message.replace("%s", StoresMessage.m_storeName);
//intent.putExtra("sms_body", message);
startActivity(inte);
}
});}
public void alerthspitl(View view){
Intent inten = new Intent(Intent.ACTION_VIEW);
SharedPreferences pref = getApplicationContext().getSharedPreferences("pref", MODE_PRIVATE);
String sms=pref.getString("msg","");
Uri uri = Uri.parse("smsto:" + sms);
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "Accident");
startActivity(intent);
Toast.makeText(getApplication(),"sent",Toast.LENGTH_LONG).show();
}
public void onBackPressed(){
AlertDialog.Builder alert=new AlertDialog.Builder(home.this);
alert.setMessage("Do you want to exit?").setCancelable(false).setPositiveButton("Yes",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
finishAffinity();
}
}).setNegativeButton("No",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
AlertDialog al=alert.create();
al.setTitle("Exit");
al.show();
return;
}
@Override
public void onLocationChanged(Location location) {
Double longitudes = location.getLongitude();
longitude = Double.toString(longitudes);
Log.e("longitude_value", longitude);
Double latitudes = location.getLatitude();
latitude = Double.toString(latitudes);
Log.e("latiude_value", latitude);
nearhospitals1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent= new Intent(home.this,near_hsptl.class);
SharedPreferences pref=getApplicationContext().getSharedPreferences("pref",MODE_PRIVATE);
SharedPreferences.Editor editor=pref.edit();
editor.putString("current_longitude", longitude);
editor.putString("current_latitude", latitude);
editor.apply();
startActivity(intent);
}
});
}
public void nearpol(View view){
nearpolice=(TextView)findViewById(R.id.nearpolicestatn1);
//Intent intent= new Intent(home.this,near_police.class);
SharedPreferences pref=getApplicationContext().getSharedPreferences("pref",MODE_PRIVATE);
SharedPreferences.Editor editor=pref.edit();
editor.putString("current_longitude", longitude);
editor.putString("current_latitude", latitude);
editor.apply();
Intent intent= new Intent(home.this,near_police.class);
startActivity(intent);
}
public void allhsp(View view){
allhspt=(TextView)findViewById(R.id.allhsptl1);
Intent intent= new Intent(home.this,all_hsptl.class);
startActivity(intent);
}
public void allpoli(View view){
allpoli=(TextView)findViewById(R.id.allpolice1);
Intent intent= new Intent(home.this,all_police.class);
startActivity(intent);
}
public void Bld(View view){
allpoli=(TextView)findViewById(R.id.allpolice1);
Intent intent= new Intent(home.this,blood.class);
startActivity(intent);
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.opt, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings){
Intent intent= new Intent(home.this,view_profile.class);
startActivity(intent);
}
else if(id==R.id.up){
Intent intent= new Intent(home.this,updt_profile.class);
startActivity(intent);
}
else if(id==R.id.pswd){
Intent intent= new Intent(home.this,updt_pswd.class);
startActivity(intent);
}
else if(id==R.id.logout){
finishAffinity();
}
return super.onOptionsItemSelected(item);
}
}
Home.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#9e9e9e"
android:id="@+id/rl"
>
<Button
android:text="Alert police"
android:textColor="#FFFFFF"
android:textStyle="bold"
android:textSize="20dp"
android:layout_width="182dp"
android:layout_height="70dp"
android:layout_marginTop="5dp"
android:background="#EF5350"
android:layout_marginLeft="5dp"
android:id="@+id/button_alert"
style="@android:style/Widget.Button.Small"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="190dp"
android:orientation="vertical"
android:layout_marginTop="5dp"
android:background="@mipmap/download"
android:layout_below="@+id/button_alert"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ALL HOSPITALS"
android:layout_marginLeft="65dp"
android:id="@+id/allhsptl1"
android:onClick="allhsp"
android:layout_marginTop="20dp"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="#f44336"/>
<Button
android:id="@+id/nearhospitals1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="60dp"
android:layout_marginTop="20dp"
android:text="Near Hospitals"
android:textColor="#f44336"
android:textSize="25dp"
android:textStyle="bold"
android:clickable="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BLOOD DONORS"
android:onClick="Bld"
android:id="@+id/Blood_donors"
android:layout_marginLeft="60dp"
android:layout_marginTop="15dp"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="#f44336"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="210dp"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:orientation="vertical"
android:background="@mipmap/hospital"
android:weightSum="1"
android:layout_marginTop="5dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ALL POLICE STATION"
android:layout_marginLeft="60dp"
android:onClick="allpoli"
android:layout_marginTop="20dp"
android:id="@+id/allpolice1"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="#f44336"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NEAR POLICE STATION"
android:layout_marginLeft="40dp"
android:onClick="nearpol"
android:layout_marginTop="40dp"
android:id="@+id/nearpolicestatn1"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="#f44336"
android:layout_weight="5.46" />
</LinearLayout>
<Button
android:text="Alert hospital"
android:textColor="#FFFFFF"
android:textStyle="bold"
android:textSize="20dp"
android:layout_width="180dp"
android:layout_height="70dp"
android:background="#EF5350"
android:layout_marginRight="5dp"
android:onClick="alerthspitl"
android:id="@+id/button_alert2"
style="@android:style/Widget.Button.Small"
android:layout_marginTop="5dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>
答案 0 :(得分：2)
您需要在onCreate（）方法中设置onClickListener，您的代码应如下所示：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
Button nearhospitals1= (Button) findViewById(R.id.nearhospitals1);
nearhospitals1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent= new Intent(home.this,near_hsptl.class);
startActivity(intent);
}
});
}
@Override
public void onLocationChanged(Location location) {
SharedPreferences pref=getApplicationContext().getSharedPreferences("pref",MODE_PRIVATE);
SharedPreferences.Editor editor=pref.edit();
editor.putString("current_longitude", String.valueOf(location.getLongitude()));
editor.putString("current_latitude", String.valueOf(location.getLatitude()));
editor.apply();
}
=＆gt;您需要从onLocationChanged（）方法中删除按钮单击侦听器。 =＆gt;您已声明两个字符串变量纬度和经度此变量商店位置数据。当您点击按钮时，它会发送意图来调用下一个活动。
答案 1 :(得分：1)
您正在另一个回调方法中设置OnClickListener，即在onLocationChanged()方法内。这意味着你的onClick触发器事件依赖于另一个回调方法。
因此，将您的nearhospitals1.setOnClickListener实施移到您的onCreate（）方法中。
注意：以此为例，开始遵循Java命名约定，建议每个类都应以大写字母开头。