这几天完成的内容有：

1.“添加图片”按钮

2.添加图片功能

遇到的问题：

我想要将添加图片按钮放在右下角，所以采用了相对布局，但是问题随之二来，因为将导航栏设置成了半透明，所以图片放到右下角之后，半透明的导航栏会把图片挡住，最后采取的办法是把图片高度变大，导航栏挡住多处的部分，也算是勉强实现要求了，但是对于一些没有虚拟导航栏的手机，按钮距离底部的间隔会显得略大，但是目前技术实在想不出更好的办法了

　　

打开图片

　　在Activity Action里面有一个“ACTION_GET_CONTENT”字符串常量，该常量让用户选择特定类型的数据，并返回该数据的URI.我们利用该常量，然后设置类型为“image/*”，就可获得android手机内的所有image。然后再通过startActivityForResult让我们选择的image返回到Activity中去

　　AddPicActivity.java

package cn.lixyz.tuji;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;
import cn.lixyz.tuji.Util.GetDate;
import cn.lixyz.tuji.sqlite.MySQLiteOpenHelper;

/**
* 添加图片类 选择图片之后，先判断用户是否安装SD卡，如果安装，则在SD卡中新建一个cn.lixyz.tuji目录，将选择的图片复制到目录中
*
* @author LGB
*
*/

public class AddPicActivity extends Activity implements View.OnClickListener {

private ImageView iv\_select\_img;  
private EditText et\_image\_name, et\_image\_tag, et\_image\_remark;  
private Button bt\_submit;  
private Bitmap bitmap;  
private File sdPath;  
private String fileName = "TUJIE" + new Date().getTime();  
private FileOutputStream fos;  
private MySQLiteOpenHelper msoh;  
private SQLiteDatabase database;

@Override  
protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity\_addpic);

    initView();

}

private void initView() {  
    iv\_select\_img = (ImageView) findViewById(R.id.iv\_select\_img);  
    et\_image\_name = (EditText) findViewById(R.id.et\_image\_name);  
    et\_image\_tag = (EditText) findViewById(R.id.et\_image\_tag);  
    et\_image\_remark = (EditText) findViewById(R.id.et\_image\_remark);  
    bt\_submit = (Button) findViewById(R.id.bt\_submit);  
    iv\_select\_img.setOnClickListener(this);  
    bt\_submit.setOnClickListener(this);  
}

@Override  
protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    super.onActivityResult(requestCode, resultCode, data);  
    if (resultCode == RESULT\_OK) {  
        Uri uri = data.getData();  
        ContentResolver cr = this.getContentResolver();  
        try {  
            bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));  
            long i = new Date().getTime();  
            copyPicToSDCard(bitmap);  
            Log.d("TTTT", "共耗时：" + (new Date().getTime() - i));  
            iv\_select\_img.setImageBitmap(bitmap);  
        } catch (FileNotFoundException e) {  
            Log.e("Exception", e.getMessage(), e);  
        } catch (IOException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
    }  
}

@Override  
public void onClick(View v) {  
    switch (v.getId()) {  
    case R.id.iv\_select\_img:  
        Intent intent = new Intent();  
        intent.setType("image/\*");  
        intent.setAction(Intent.ACTION\_GET\_CONTENT);  
        startActivityForResult(intent, 1);

        break;  
    case R.id.bt\_submit:  
        String picName = et\_image\_name.getText().toString().trim();  
        String picTag = et\_image\_tag.getText().toString().trim();  
        String picRemark = et\_image\_remark.getText().toString().trim();  
        msoh = new MySQLiteOpenHelper(AddPicActivity.this, "TujiData", null, 1);  
        database = msoh.getWritableDatabase();  
        ContentValues cv = new ContentValues();  
        cv.put("picName", picName);  
        cv.put("picTag", picTag);  
        cv.put("picRemark", picRemark);  
        cv.put("fileName", fileName);  
        cv.put("date", new GetDate().getDate());  
        database.insert("pics", null, cv);  
        database.close();

        break;  
    }  
}

private void copyPicToSDCard(Bitmap bm) throws IOException {  
    if (Environment.getExternalStorageState().equals(android.os.Environment.MEDIA\_MOUNTED)) {  
        /\* 得到SD卡得路径 \*/  
        sdPath = Environment.getExternalStorageDirectory();  
        try {  
            File dir = new File(sdPath + "/cn.lixyz.TuJi");

            fos = new FileOutputStream(new File(dir + "/" + fileName + ".png"));  
            if (!dir.exists()) {  
                dir.mkdir();  
                bm.compress(Bitmap.CompressFormat.PNG, 100, fos);  
            } else {  
                bm.compress(Bitmap.CompressFormat.PNG, 100, fos);  
            }  
        } catch (FileNotFoundException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        } finally {  
            fos.flush();  
            fos.close();  
        }  
    } else {  
        Toast.makeText(AddPicActivity.this, "未检测到您的SD卡，长时间使用本软件，会造成系统空间减少", Toast.LENGTH\_SHORT).show();  
    }  
}  

}