Solution 1 :
So finally i got the fix for it..thanks to “David Wasser” as i didnt looked at logcat initially. through his suggetion i looked at logcat & found an error of runtime call permission which i didn’t added in code , and this hint also given by “vikas kumar” thanks to him..
now the changes. following are the changes i made in mainactivity : –
if (ContextCompat.checkSelfPermission(getApplicationContext(), CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
startActivity(callIntent);
} else {
requestPermissions(new String[]{CALL_PHONE}, 1);
}
this asks for runtime permission for telephony & when granted it will directly place a call.
Why This changes needed ?
Because from Android 6.0 Above there were api changes & also permission related changes.
& i followed older example of calling app tutorial.
Problem :
I Tried to Create Caller app using intent, in android studio ide code is error free but when it is run on live device & put in the number in EditText & Call button is pressed app suddenly exits.. im unable to find what causes this app behaviour and why call is not getting placed..How do i make it work ?
MainActivity.java
public class MainActivity extends AppCompatActivity {
EditText txt_phn;
Button btn_call;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt_phn=(EditText)findViewById(R.id.txt_phn);
btn_call=(Button)findViewById(R.id.btn_call);
btn_call.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
mck();
}
});
}
private void mck()
{
String number = "tel:" + txt_phn.getText().toString().trim();
Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse(number));
try {
startActivity(callIntent);
finish();
Log.i("Finished making a call", "");
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(this, "Call faild, please try again later.", Toast.LENGTH_SHORT).show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns_android="http://schemas.android.com/apk/res/android"
package="com.example.caller">
<uses-permission android_name="android.permission.CALL_PHONE"/>
<application
android_allowBackup="true"
android_icon="@mipmap/ic_launcher"
android_label="@string/app_name"
android_roundIcon="@mipmap/ic_launcher_round"
android_supportsRtl="true"
android_theme="@style/AppTheme">
<activity android_name=".MainActivity">
<intent-filter>
<action android_name="android.intent.action.MAIN" />
<category android_name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns_android="http://schemas.android.com/apk/res/android"
xmlns_app="http://schemas.android.com/apk/res-auto"
xmlns_tools="http://schemas.android.com/tools"
android_layout_width="match_parent"
android_layout_height="match_parent"
tools_context=".MainActivity">
<EditText
android_id="@+id/txt_phn"
android_layout_width="379dp"
android_layout_height="70dp"
android_layout_marginTop="148dp"
android_ems="10"
android_hint="Please Enter Phone Number To Call"
android_inputType="text"
app_layout_constraintTop_toTopOf="parent"
tools_layout_editor_absoluteX="16dp" />
<Button
android_id="@+id/btn_call"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_marginBottom="360dp"
android_text="Call"
app_layout_constraintBottom_toBottomOf="parent"
app_layout_constraintEnd_toEndOf="parent"
app_layout_constraintHorizontal_bias="0.5"
app_layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
2020-08-10 20:04:47.337 23806-23806/com.example.caller E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.caller, PID: 23806
java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxxxxxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{70113a3 23806:com.example.caller/u0a425} (pid=23806, uid=10425) with revoked permission android.permission.CALL_PHONE
at android.os.Parcel.createException(Parcel.java:2071)
at android.os.Parcel.readException(Parcel.java:2039)
at android.os.Parcel.readException(Parcel.java:1987)
at android.app.IActivityTaskManager$Stub$Proxy.startActivity(IActivityTaskManager.java:3851)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1714)
at android.app.Activity.startActivityForResult(Activity.java:5210)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:676)
at android.app.Activity.startActivityForResult(Activity.java:5168)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:663)
at android.app.Activity.startActivity(Activity.java:5539)
at android.app.Activity.startActivity(Activity.java:5507)
at com.example.caller.MainActivity.mck(MainActivity.java:49)
at com.example.caller.MainActivity.access$000(MainActivity.java:19)
at com.example.caller.MainActivity$1.onClick(MainActivity.java:33)
at android.view.View.performClick(View.java:7260)
at android.view.View.performClickInternal(View.java:7237)
at android.view.View.access$3600(View.java:802)
at android.view.View$PerformClick.run(View.java:27915)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:915)
Caused by: android.os.RemoteException: Remote stack trace:
at com.android.server.wm.ActivityStackSupervisor.checkStartAnyActivityPermission(ActivityStackSupervisor.java:1058)
at com.android.server.wm.ActivityStarter.startActivity(ActivityStarter.java:762)
at com.android.server.wm.ActivityStarter.startActivity(ActivityStarter.java:585)
at com.android.server.wm.ActivityStarter.startActivityMayWait(ActivityStarter.java:1298)
at com.android.server.wm.ActivityStarter.execute(ActivityStarter.java:516)
Comments
Comment posted by David Wasser
If the app “suddenly exits”, that means that it crashed. If it crashes, there will be exception logs and stack trace in the logcat. Please look there. If you can’t figure it out, post the relevant parts of the logcat here in your question.
Comment posted by vikas kumar
it seems you need to get the permission for android.permission.CALL_PHONE. add it and will work
