嘿,我是android和eclipse环境的新手。我对Java一无所知。我正在尝试创建一个应用程序来打开安卓设备的摄像头。这就是我的main activity。java的样子
package com.example.trycamera2;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
private Uri fileUri;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button_send);*****
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/xray");
dir.mkdirs();
File file = new File(dir, "tmp_avatar_"
+ String.valueOf(System.currentTimeMillis()) + ".jpg");
fileUri = Uri.fromFile(file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}
});
};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
Bitmap tempBitmap = (Bitmap) data.getExtras().get("data");
FileOutputStream out;
try {
out = new FileOutputStream(fileUri.getPath());
tempBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
Log.v("ManageImage-other", "another phone type");
e.printStackTrace();
}
// Image captured and saved to fileUri specified in the Intent
Toast.makeText(this, "Image saved to:n" +
data.getData(), Toast.LENGTH_LONG).show();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the image capture
} else {
// Image capture failed, advise user
}
}
}
}
在星号线的button_send下面有一个红色标记…它显示了一个替代action_settings而不是button_send....但是当我用action_settings替换并运行时,启动被取消。在模拟器上安装。apk失败,任何帮助都会很有用
听起来Android在任何布局中都找不到你的按钮。仔细检查你的布局,确保它们在那里。
如果是,请转到顶部的Project菜单,然后选择Clean。选择您的项目,然后单击ok。清理和构建需要一些时间,但这可能会解决您的问题。