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Showing posts with label ndk tutorial. Show all posts
Showing posts with label ndk tutorial. Show all posts

Wednesday, April 15, 2015

Fatal signal 11 (SIGSEGV) at 0x3b0dcef0 (code=1)

 Fatal signal 11 (SIGSEGV) at 0x3b0dcef0 (code=1), thread 973
 Send stop signal to pid:973 in void debuggerd_signal_handler(int, siginfo_t*, void*)

!!! FAILED BINDER TRANSACTION !!!

 !!! FAILED BINDER TRANSACTION !!!


I got this issue while transferring large bitmap data.

intent.putExtra("imagedata", data);

To resolve this issue, avoid transferring of large bitmaps.

The binder transaction failed due to large size.During remote procedure call, arguments and the returned value of call transferred as Parcel objects stored under the binder transaction buffer. If the returned value or arguments too large to fit in the transaction butter, the call will get fail and TransactionTooLargeException will be thrown.





Friday, April 10, 2015

java.lang.UnsatisfiedLinkError Android NDK

04-10 14:49:35.505: E/AndroidRuntime(14206): java.lang.UnsatisfiedLinkError: Native method not found: com.permadi.testjni.TestJNIActivity.stringFromJNICPP:()Ljava/lang/String;
04-10 14:49:35.505: E/AndroidRuntime(14206): at com.permadi.testjni.TestJNIActivity.stringFromJNICPP(Native Method)
04-10 14:49:35.505: E/AndroidRuntime(14206): at com.permadi.testjni.TestJNIActivity.onCreate(TestJNIActivity.java:18)
04-10 14:49:35.505: E/AndroidRuntime(14206): at android.app.Activity.performCreate(Activity.java:5275)
04-10 14:49:35.505: E/AndroidRuntime(14206): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)




Solution: please check the package name and method name for an activity. I got this issue due to case sensitive in cpp file for package name or method name.

Android NDK Hello World


TestJNIActivity.java

package com.permadi.testjni;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class TestJNIActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_jni);


TextView myTextField = (TextView)findViewById(R.id.myTextField);
       myTextField.setText(stringFromJNICPP());
}


public native String  stringFromJNICPP();

static {
        System.loadLibrary("TestJNI");
    }

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.test_jni, 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) {
return true;
}
return super.onOptionsItemSelected(item);
}
}




TestJNI.cpp

#include <string.h>
#include <jni.h>
#include <android/log.h>

 extern "C" {
     JNIEXPORT jstring JNICALL Java_com_permadi_testjni_TestJNIActivity_stringFromJNICPP(JNIEnv * env, jobject obj);
 };

 JNIEXPORT jstring JNICALL Java_com_permadi_testjni_TestJNIActivity_stringFromJNICPP(JNIEnv * env, jobject obj)
 {
return env->NewStringUTF("Hello World");
 }

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