android-bitmap创建设置图片

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bitmap创建设置图片

package zhang.decodeFile;import java.io.File;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;public class decodeFile extends Activity {private ImageView mImageView;private Button mButton;private TextView mTextView;private String fileName="/data/q2.jpg";    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                mButton = (Button)findViewById(R.id.button1);        mButton.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmImageView=(ImageView)findViewById(R.id.imageView1);mTextView=(TextView)findViewById(R.id.TextView1);File f =  new File(fileName);if(f.exists()){Bitmap bm = BitmapFactory.decodeFile(fileName);mImageView.setImageBitmap(bm);mTextView.setText(fileName);}else{mTextView.setText(fileName+"no");}                }});        }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView   android:id="@+id/TextView1"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    /><ImageView android:layout_height="wrap_content" android:src="@drawable/qq" android:id="@+id/imageView1" android:layout_width="wrap_content"></ImageView><Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button></LinearLayout>