进度条

来源：互联网发布：2016易语言源码大全编辑：程序博客网时间：2024/05/29 03:20

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="<"
android:onClick="before"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"
android:onClick="add"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:onClick="sub"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=">"
android:onClick="next"
/>
</LinearLayout>
<ImageView
android:layout_width="300dp"
android:layout_height="400dp"
android:id="@+id/iv_image_image"
android:background="#ff0000"
/>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#ff0000"
android:id="@+id/iv_image_new"
/>

</LinearLayout>

布局文件

java代码

public class ImageActivity extends AppCompatActivity {
//Ctrl+Alt+F
private ImageView iv_image_image;

private int images[]={R.drawable.s1,
R.drawable.s2,
R.drawable.s3,
R.drawable.s4,
R.drawable.s5
};

int currentIndex=0;
int currentAlpha=255;
private File[] files;
private Bitmap bm;
private ImageView iv_image_new;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
iv_image_image = (ImageView) findViewById(R.id.iv_image_image);
iv_image_new = (ImageView) findViewById(R.id.iv_image_new);

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
String sdCardPath=Environment.getExternalStorageDirectory().getAbsolutePath();
File file=new File(sdCardPath+"/images");
files = file.listFiles();
}

iv_image_image.setImageResource(images[currentIndex]);
bm = BitmapFactory.decodeFile(files[0].getAbsolutePath());
iv_image_image.setImageBitmap(bm);
iv_image_image.setImageAlpha(currentAlpha);
iv_image_image.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
float x=motionEvent.getX();
float y=motionEvent.getY();
Bitmap bmNew=Bitmap.createBitmap(bm,(int)x,(int)y,50,50);

iv_image_new.setImageBitmap(bmNew);
return true;
}
});
}

public void before(View view){
currentIndex--;
if(currentIndex<0){
currentIndex=0;
Toast.makeText(ImageActivity.this, "兄弟，没得选了", Toast.LENGTH_SHORT).show();
}
//iv_image_image.setImageResource(images[currentIndex]);
bm= BitmapFactory.decodeFile(files[currentIndex].getAbsolutePath());
iv_image_image.setImageBitmap(bm);
}
public void next(View view){
currentIndex++;
if(currentIndex>=images.length){
currentIndex=images.length-1;
Toast.makeText(ImageActivity.this, "兄弟，没得选了", Toast.LENGTH_SHORT).show();
}
//iv_image_image.setImageResource(images[currentIndex]);
bm= BitmapFactory.decodeFile(files[currentIndex].getAbsolutePath());
iv_image_image.setImageBitmap(bm);
}

public void add(View view){
currentAlpha-=20;
if(currentAlpha<=0){
currentAlpha=0;
Toast.makeText(ImageActivity.this, "看不见了", Toast.LENGTH_SHORT).show();
}
iv_image_image.setImageAlpha(currentAlpha);
}
public void sub(View view){
currentAlpha+=20;
if(currentAlpha>=255){
currentAlpha=255;
Toast.makeText(ImageActivity.this, "都给你了", Toast.LENGTH_SHORT).show();
}
iv_image_image.setImageAlpha(currentAlpha);
}
}

public void download(View view){
new MyThread().start();
}

Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
int i=msg.what;
tv_progressbar_num.setText(i+"");
}
};
class MyThread extends Thread{
@Override
public void run() {
super.run();
for (int i = 0; i <=100 ; i++) {
pb_progressbar_bar.setProgress(i);
// tv_progressbar_num.setText(i+"");
handler.sendEmptyMessage(i);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}

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