Android Studio NDK 入门教程——源码

package org.scheming.jnidemo; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.widget.EditText; import android.widget.TextView; public class MainActivity extends AppCompatActivity implements TextWatcher { private TextView textView; static { System.loadLibrary("native"); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); EditText editText = (EditText) findViewById(R.id.edit); textView = (TextView) findViewById(R.id.text); editText.addTextChangedListener(this); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void afterTextChanged(Editable s) { textView.setText(sayHello(s.toString())); } public native String sayHello(String name); }