package com.pingyijinren.test;import android.annotation.TargetApi;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.ContentResolver;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Build;import android.os.Environment;import android.provider.MediaStore;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import java.io.File;import java.io.FileNotFoundException;public class MainActivity extends AppCompatActivity{    private Button button;    private ImageView imageView;    private Uri uri;    private File file;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button=(Button)findViewById(R.id.button);        imageView=(ImageView)findViewById(R.id.imageView);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                file=null;                try{                    file=new File(Environment.getExternalStorageDirectory()+"/test.jpg");                    if(file.exists()){                        file.delete();                    }                    file.createNewFile();                    uri= Uri.fromFile(file);                    Intent intent=new Intent("android.intent.action.GET_CONTENT");                    intent.setType("image/*");                    startActivityForResult(intent,1);                }                catch(Exception e){}            }        });    }    @Override    protected void onActivityResult(int requestCode,int resultCode,Intent data){        if(requestCode==1){            uri=data.getData();            Intent cropIntent=new Intent("com.android.camera.action.CROP");            cropIntent.setDataAndType(uri,"image/*");            cropIntent.putExtra("scale",true);            cropIntent.putExtra(MediaStore.EXTRA_OUTPUT,uri);            startActivityForResult(cropIntent,2);        }        else if(requestCode==2){            try{                Bitmap bitmap= BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));                imageView.setImageBitmap(bitmap);            }            catch(Exception e){}        }    }}