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if (!file.exists()) {
file.createNewFile();
}
FileOutputStream os = ctx.openFileOutput(file.getName(),
Context.MODE_WORLD_WRITEABLE);
byte[] bytes = new byte[512];
int i = -1;
while ((i = is.read(bytes)) > 0) {
os.write(bytes);
}
os.close();
is.close();
String permission = "666";
try {
String command = "chmod " + permission + " " + apkPath
+ "/" + destapkName;
Runtime runtime = Runtime.getRuntime();
runtime.exec(command);
} catch (IOException e) {
e.printStackTrace();
}
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
public class FileTestActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//创建输入输出流对象
FileOutputStream outfile = null;
FileInputStream infile = null;
try {
//创建openFile的两个对象 openFileOutput()的两个参数
//第一个是文件名,第二个是属性,0代表只允许应用程序操作这个文件
outfile = this.openFileOutput("test.txt", 0);
infile = this.openFileInput("test.txt");
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
DataOutputStream dout = null ;
try {
//写文件
dout = new DataOutputStream(outfile );
dout.writeUTF("testtesttesttesttesttest");
dout.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
DataInputStream din = null;
//读文件
din = new DataInputStream(infile);
String result = null;
try {
result = din.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(result);
}
}