我使用了一个Android项目代码，在点击文本时加载附近的医院和警察局。但是，当我点击Nearbyhospital时，应用程序强制关闭，在主页的xml文件中，它说iam从未使用过onclick方法，我尝试在.java页面中为nearhs添加方法..仍然有很多错误.. 有没有人看到我遗失某些东西或犯了错误的东西？
以下Logcat：
java.lang.IllegalStateException: Could not find method nearhs(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatTextView with id 'nearhospitals1'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:307)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:266)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22433)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:6208)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:891)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:781)
Home.java：
public class home extends AppCompatActivity implements LocationListener{
Button alert;
RelativeLayout rl1;
TextView nearhspt;
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();
nearhspt= (TextView) 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);
nearhspt.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"/>
>
>
> <TextView
> android:id="@+id/nearhospitals1"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:layout_marginLeft="60dp"
> android:layout_marginTop="20dp"
> android:onClick="nearhs"
> android:text="Near Hospitals"
> android:textColor="#f44336"
> android:textSize="25dp"
> android:textStyle="bold" />
>
> <TextView
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Blood Doners"
> 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 PoliceStation"
> 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 PoliceStation"
> 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：4)
您已定义android:onClick="nearhs"，但您的活动中没有此类名称可用的方法。
在您的活动中添加此内容：
public void nearhs(View view) {
}
您还试图在onClickListener中为nearhspt设置onLocationChanged()。将此监听器移至onResume()或onCreate()。