5、编写Java文件
$ROOT_DIR/app/src/main/java/com/example/chengang/myapplication/MainActivity.java内容如下。
其中getStringFromNative()方法是我们实现的，打印了Ffmpeg库的版本号（我编译的这个是3673444）和视频文件的信息出来。
package com.example.chengang.myapplication;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView view = (TextView) findViewById(R.id.mytext);
view.setText(this.getStringFromNative());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public native String getStringFromNative();
static {
System.loadLibrary("swresample-1");
System.loadLibrary("avutil-54");
System.loadLibrary("avformat-56");
System.loadLibrary("avcodec-56");
System.loadLibrary("swscale-3");
System.loadLibrary("ovsplayer");
}
}
附上布局文件是这样的。
<RelativeLayout xmlns:android="http://www.easck.com/apk/res/android" xmlns:tools="http://www.easck.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <TextView android:id="@+id/mytext" android:text="@string/hello_world" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </RelativeLayout>
