5.27作业

package com.hanqi.myapplication;

import android.content.res.AssetManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

import java.io.FileOutputStream;
import java.io.InputStream;

public class Test3 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test3);
    }
    public void bt_OnClick(View v){

       try{
        AssetManager am =getAssets();
        InputStream is=am.open("p7.jpg");
           String path = getExternalFilesDir("text").getCanonicalPath();
           Toast.makeText(Test3.this, "path=" + path, Toast.LENGTH_LONG).show();
           FileOutputStream fos = new FileOutputStream(path+"/p8.jpg");
           byte[] b=new byte[1024];
           int i=0;

           while((i=is.read(b))>0){
              fos.write(b,0,i);

           }
           is.close();
           fos.close();


       }
       catch (Exception e){
           Toast.makeText(Test3.this, "path=" , Toast.LENGTH_LONG).show();
       }
    }
}