android-bitmap创建设置图片_android创建bitmap图片使图片靠左展示-优快云博客

本文链接：https://blog.youkuaiyun.com/zhangnianxiang/article/details/6657497

本文详细介绍了如何在Android中创建和设置Bitmap图片，包括从本地文件、网络资源等加载Bitmap，以及在布局中显示Bitmap的方法。

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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(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				mImageView=(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>