我有一个字符串名称＆＃34; classe＆＃34;。它包含许多单词和短语。但是当字符串包含单词"idiom"时，我想要更改颜色。我以编程方式完成了这项工作，但它改变了所有字符串＆＃34; classe＆＃34;的颜色。我只是想改变＆＃34;成语＆＃34;的颜色。 （单词的一部分，而不是整个短语）。我怎么能以编程方式做到这一点？
if (classe.contains("idiom")) {
txtclasse.setTextColor(getResources().getColor(R.color.orange));
}
答案 0 :(得分：5)
使用ForegroundColorSpan。
import android.Manifest;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.IntentSender;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResult;
import com.whattaspot.R;
import com.whattaspot.parameters.ParameterConst;
import com.whattaspot.utils.ConnectionDetector;
import com.whattaspot.utils.LocationProvider;
public class NewsfeedActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener{
public static final int CONNECTION_FAILURE_RESOLUTION_REQUEST = 0x3;
private final int PERMISSION_REQUEST_LOCATION = 0;
private final String TAG = NewsfeedActivity.class.getSimpleName();
private double currentLatitude, currentLongitude;
private String mLastToken;
private LocationProvider mLocationProvider;
private GoogleApiClient mGoogleApiClient;
// views
private View rootView;
private RecyclerView mRecyclerView;
private LinearLayoutManager mLayoutManager;
private LocationRequest mLocationRequest = new LocationRequest();
private Location mLastlocation;
@SuppressWarnings("ConstantConditions")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_newsfeed);
// Toolbar inizialization
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setTitle(getString(R.string.title_newsfeed).toUpperCase());
// Restore preferences
SharedPreferences settings = getSharedPreferences(
ParameterConst.WHATTASPOT_TOKEN_TYPE, Activity.MODE_APPEND);
mLastToken = settings.getString(ParameterConst.PARAM_TOKEN_NAME, null);
// Inizializzo il Location provider
//mLocationProvider = new LocationProvider(this, this);
// Initialize views
rootView = findViewById(R.id.container);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.newsfeed_recycler_view);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
/* overridePendingTransition(0, 0); */
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
mLocationRequest = LocationRequest.create()
.setInterval(10000)
.setFastestInterval(100)
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
}
@Override
public void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
Log.d(TAG, "GoogleApiClient disconnect");
// Disconnect the GoogleApiClient
//mLocationProvider.disconnect();
}
@Override
public void onStart(){
mGoogleApiClient.connect();
super.onStart();
Log.d(TAG, "GoogleApiClient connect");
}
@Override
public void onResume() {
super.onResume();
// Check the internet connection
if (!ConnectionDetector.isNetworkAvailable(this)) {
Log.d(TAG, "No Internet connection.");
Snackbar.make(rootView, "No Internet connection.", Snackbar.LENGTH_LONG).show();
}
mGoogleApiClient.connect();
Log.d(TAG, "GoogleApiClient connect AGAIN");
}
@Override
public void onConnected(Bundle bundle) {
// Check permission for Android M
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
Log.d(TAG, "Checkpoint 1");
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
} else {
Log.d(TAG, "Checkpoint 2");
String permit = String.valueOf(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION));
Log.d(TAG, permit);
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
PERMISSION_REQUEST_LOCATION);
String granted = String.valueOf(PackageManager.PERMISSION_GRANTED);
Log.d(TAG, permit);
Log.d(TAG, granted);
}
}
Log.d(TAG, "Checkpoint 3");
}
@Override
public void onLocationChanged(Location location) {
mLastlocation = location;
}
@Override
public void onConnectionSuspended(int i) {
Log.d(TAG, "GoogleApiClient connection has been suspended");
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.d(TAG, "GoogleApiClient connection failed");
/*
* Google Play services can resolve some errors it detects.
* If the error has a resolution, try sending an Intent to
* start a Google Play services activity that can resolve
* error.
*/
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Log.d(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String[] permissions, int[] grantResults) {
Log.d(TAG, "In ORPR.");
switch (requestCode) {
case PERMISSION_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.d(TAG, "Checkpoint ORPR, Yes.");
if (mLastlocation == null) {
try {
if(mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
mLastlocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
Log.d(TAG, "Location retrieved.");
}
} catch (SecurityException ex){
Log.d(TAG, "Location not retrieved.");
}
} else {
Log.d(TAG, "Location not retrieved");
}
Log.d(TAG, "Location changed. New location: " + String.valueOf(mLastlocation.getLatitude()));
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
Log.d(TAG, "Checkpoint ORPR, No.");
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
答案 1 :(得分：2)
您可以使用HTML来解决它。
origString = txtclasse.getText().toString();
origString = origString.replaceAll("idiom","<font color='red'>idiom</font>");
txtclasse.setText(Html.fromHtml(origString));