*这是编码和解码Image到Base64的代码，反之亦然* /
package com.example.santosh.encode;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import com.example.santosh.encode.Base64;
/**
* A placeholder fragment containing a simple view.
*/
public class FragmentBFragment extends Fragment {
public FragmentBFragment() {
}
TextView textFile;
EditText editText;
Button clear,decode,send;
private static final int PICK_FILE=1;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = (View) inflater.inflate(R.layout.fragment_fragment_b, container, false);
Button select = (Button) v.findViewById(R.id.button4);
textFile = (TextView) v.findViewById(R.id.textView6);
clear = (Button) v.findViewById(R.id.imageButton);
editText = (EditText) v.findViewById(R.id.editText3);
select.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
startActivityForResult(intent, PICK_FILE);
}
}
);
clear.setOnClickListener(new View.OnClickListener() { // this is working
@Override
public void onClick(View v) {
Activity activity;
activity = getActivity();
editText.setText("");
Toast toast = Toast.makeText(activity, "Text Has Been Cleaned", Toast.LENGTH_LONG);
toast.show();
}
});
send.setOnClickListener(new View.OnClickListener() { /* There is error NullPointer*/
public void onClick(View v) {
Intent sendIntent = new Intent();
String send;
send=editText.getText().toString();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, send);
sendIntent.setType("text/plain");
startActivity(sendIntent);
}
}
);
decode.setOnClickListener(new View.OnClickListener() { /*there is also same error*/
@Override
public void onClick(View v) {
Activity activity;
activity = getActivity();
SharedPreferences pref =activity.getSharedPreferences("PREF_NAME", Context.MODE_PRIVATE);
pref.edit().putString("NAME", editText.getText().toString()).commit();
Toast toast = Toast.makeText(activity, "Image for this Code", Toast.LENGTH_LONG);
toast.show();
}
});
return v;
}
public void onActivityResult(int requestCode, int resultCode, Intent data)
{ /* this is also working*/
super.onActivityResult(requestCode, resultCode, data);
Bitmap bitmap = null;
String Path=data.getData().getPath();
textFile.setText(Path);
if (resultCode == Activity.RESULT_OK)
{
Uri imageUri = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), imageUri);
} catch (IOException e) {
e.printStackTrace();
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (bitmap != null) {
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
}
byte[] b = baos.toByteArray();
String imageEncoded = Base64.encodeBytes(b);
editText.setText(imageEncoded);
}
}
}