a jni and ndk demo application for ndk starter.
效果图：
Demo示例：
#Calculator.java:
/**
- Created by caizhiming on 2016/2/5. */
public class Calculator {
static {
System.loadLibrary("mysolib");
}
public native int add(int a,int b);
public native int sub(int a,int b);
public native void set(String str);
public native String get();
}
#MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private TextView mTvAdd;
private TextView mTvSub;
private TextView mTvString;
private TextView mBtnCalc;
private TextView mBtnGetString;
private Calculator mCalculator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCalculator = new Calculator();
mTvAdd = (TextView) findViewById(R.id.tv_add);
mTvSub = (TextView) findViewById(R.id.tv_sub);
mTvString = (TextView)findViewById(R.id.tv_get_string);
mBtnCalc = (TextView) findViewById(R.id.btn_calc);
mBtnGetString = (TextView)findViewById(R.id.btn_get_string);
mBtnCalc.setOnClickListener(this);
mBtnGetString.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn_calc:
mTvAdd.setText("23+24="+mCalculator.add(23,24));
mTvSub.setText("24-12="+mCalculator.sub(24,12));
break;
case R.id.btn_get_string:
mTvString.setText(mCalculator.get());
break;
}
}
}